yoomi Warmer Installation guide

yoomi FAQ’s

how does the warmer work?
The warmer works in the same way as the gel hand-warming packs that warm up when you click a
metal disc inside – when you press the orange button on the yoomi warmer, you’re effectively click-
ing the metal disc and it’s the phase change from liquid to solid inside the warmer that creates the
instant warmth.
The cold feed is gently warmed as it flows around the specially designed channels on the outside of
the warmer. By the time the feed reaches the teat, it is at natural breast milk temperature (32-34
deg C). The warmer has been carefully designed to stay warm for up to one hour.
You then need to recharge the warmer between each use. Recharging takes the warmer back to
its liquid state inside, ready to use again.
are the contents of the warmer safe?
Yes, the contents of the warmer are safe. The warmer contains the same gel as used in commonly
available hand warmer packs.
The gel is a non-toxic, concentrated salt solution (It is used as an additive in ice cream). Just to be
extra safe, we have added a food grade colourant so that any leaks are visible, and Bitrex®, a safe
but bitter substance that will ensure that in the very unlikely event of a leak, baby will not swallow
any of the solution.
can yoomi overheat my baby's feed?
No, it cannot. Our engineers have designed the yoomi system so that it is impossible for baby's feed
to be warmed above a safe, maximum temperature (when used as instructed). This means that
there is no possibility of baby being exposed to unsafe temperatures from either the bottle or the
warmer.
how do I know when my warmer is ready to use (fully recharged)?
Your warmer is ready to use when: 1) it has been allowed to cool after recharge (75 minutes at room
temperature or 20 minutes in cold water), 2) it rattles when you gently shake it (when warmer is cool)
and 3) the button is orange.
how do I know that the warmer has begun to warm up after I have pressed the orange button?
After pressing the orange button firmly, please WAIT 30 seconds for the orange button to start
fading. A blue button indicates that the warmer is warming up. Also, after 2-3 seconds the warmer
will no longer rattle when gently shaken.
how do I know when I need to recharge the warmer?
Your warmer needs to be recharged if there is no rattle when you shake it. This is because it is still
solid inside after its last use. To recharge it you need to ‘melt’ the contents to take it back to a liquid
so that it’s ready to go again. A new warmer will always need charging before its first use.
yoomi warmers

my warmer won’t activate - the rattle is there and sounds like a ball in liquid
If your warmer has charged correctly and you have a rattle that sounds like a ball in liquid, but
your warmer will not activate, the button has become deactivated. You can reset your warmer
easily with the following steps;
1. Put your warmer in the deep freeze (under the peas etc!) for 90 - 100 minutes but no longer.
2. After 90 - 100 minutes, take the warmer out of the freezer and shake it. The rattle should still be
there although it may sound a bit fainter - as if the contents inside have frozen.
3. Press the button firmly. It may take a few repeated prods with slightly more force.
4. It should activate as normal - you'll know if it has activated as the rattle will disappear within 2-3
seconds & it will begin to get warm.
5. Although you can't use this warmer for a feed, it will completely reset it and so you won't ever
have to freeze it again.
when should I replace my warmer?
Replace the warmer at the first sign of damage or if blue dye is visible.
Replace your warmer after 300 uses
Replace your warmer if the button no longer turns orange at all after being cooled to room tem-
perature
There is a tick box table within the instructions to help you keep track of your usage.
how can I sterilise and recharge the yoomi warmer?
The warmer should be sterilised and recharged before each use. There are 3 options to recharge
the warmer; in a microwave using the yoomi pod, in a pan of boiling water or in an electric steam
steriliser. Boiling and steaming also sterilises but when using the pod, you need to then sterilise the
warmer either in a (non-microwave) steam steriliser, in boiling water or by using a cold water steri-
lisation solution.
how soon after recharge can I use it again?
Please be careful when handling the warmer as it will be very hot immediately after the comple-
tion of the sterilisation cycle or after recharging.
Please let the warmer cool for 75 minutes (at room temperature) or for 20 minutes (in a bowl of
cold water). If you use water, the warmer will no longer be sterile (fine for babies over 1 year) . Try
using a cold water sterilisation solution to speed up the cooling and also keep it sterile for longer.
how long does the warmer stay charged?
In general the warmer will remain recharged almost indefinitely and will be ready for use when
you press the orange button - so it’s up to you how often you would like to use your warmer. Very
occasionally, it is possible that the warmer can be inadvertently activated if it is bumped hard, so
keep it protected and remember that it will need re-sterilising if left for long periods. Use the
warmer within 18 months from the date of purchase.
my warmer does not recharge or will not stay recharged
It may not have been charged for a sufficient period of time, try recharging it again - follow the
recharge tips on the instructions. Very occasionally it is possible that the warmer can be activat-
ed by being bumped hard. Please handle the warmer with care.

I have pressed the button when the warmer was hot, is this a problem?
Yes, pressing the button when the warmer is hot deactivates the warmer and prevents the
warmer from working. Unfortunately, the warmer will need to be replaced if this occurs.
my warmer is charged, but no longer sterile – how can I sterilise it? Do I have to recharge it again?
Once your warmer is charged, it stays charged indefinitely, however it will need re-sterilising if you
don’t use it straight away. You can either put it on a regular sterilisation cycle (not in a micro-
wave) but remember you’ll have to let it cool. The perfect way to re-sterilise your warmers is to use
a cold-water sterilisation solution such as Milton. This way you can sterilise the warmers and use
them straight away.
does yoomi fit in conventional sterilisers from other manufacturers and which do you recommend
to charge the yoomi warmers?
All yoomi parts fit in conventional sterilisers from other manufacturers. It is best to sterilise the yoomi
bottle separately from the yoomi warmer as the warmer requires additional time in the steriliser.
The following electric steam sterilisers are compatible with yoomi warmers:
Avent electronic steam steriliser: use 160ml of water to charge the warmer
Boots electronic steam steriliser: use 320 ml of water to charge the warmer
Mothercare electronic steam steriliser: use 280 ml of water to charge the warmer
does the warmer adversely affect the nutrients of my baby's feed?
No, it does not. The yoomi warmer has been specially designed to gently warm baby's feed to
breast milk temperature. This gentle process ensures that baby receives the maximum nutrition
from the feed unlike other heating methods such as a microwave which can damage nutrients.

Before first use;
The biggest risk of using the pods is that you over cook your warmer and it bursts during recharge. In
this instance you would have to replace your warmer.
To reduce this risk, we have provided timings for your microwave that are more likely to undercook
your warmer i.e you will not have a fully charged warmer once it has cooled. You’ll know this as your
warmer will be hard and slushy at the base. Please see the recharge tips for further advice on using
your pod.
Is metal ok to go in my microwave?
The yoomi pod has been designed for use in a microwave. The metal is aluminium and is perfectly
safe for use in domestic microwaves. However we do not advise putting any other metal objects in
your microwave.
How much should I shake the pod?
Shake the pod vigorously for 30 seconds – you need to do this to ensure the heat is evenly distribut-
ed around the solution inside. This helps reduce the risk of overcooking.
Why can’t I merge the times?
Think of your yoomi warmer as an egg. Eggs are sensitive in a microwave and so is your yoomi
warmer. The pods do a great job of protecting it but microwaves themselves are very powerful.
Shaking distributes the solution inside evenly, just like when you mix your microwave meal etc
If you merge the times without shaking the warmer in-between, the heat does not get evenly distrib-
uted and you risk overcooking the warmer which will permanently damage your warmer.
How do I know if I’ve overcooked my warmer and what do I need to do?
You will know if you’ve overcooked your warmer as you will see the red band and the blue liquid
inside the pod. Imagine putting an egg in the microwave – it will burst due to the pressure of being
a sealed unit. This is the same as a yoomi warmer. Blue liquid will seep out and you will need to
replace your warmer.
If you see blue liquid do not open the pod until it is cool. The blue liquid is non-toxic but may be hot.
Can I charge more than one warmer in its pod at once?
No. The yoomi pods are cleverly designed to protect the warmer in the microwave and help distrib-
ute the heat evenly. By putting 2 warmers & pods in the microwave, we cannot predict the times
required for your specific microwave and you risk over cooking them.
Why doesn’t the microwave sterilise my warmer?
The time is takes for the microwaves to charge the warmer is not long enough to sterilise it.
How shall I sterilise my warmer?
If you need to sterilise your warmer after microwave charging and only have a microwave steriliser,
try using a cold water sterilisation solution or boil your warmer in water for 4mins to sterilise it.
using the yoomi pod

Can I put my warmer in a microwave steriliser in its pod?
No, the warmer will not sterilise inside its pod, but remember you cannot put your warmer in the
microwave without its pod.
Can I use the yoomi pod with my older warmers?
Your new warmers have been strengthened to increase the life to 300 uses. Therefore older
warmers should be fine in the pod but they may not last as long.
How long will my pod last?
Your pod will last as long as your warmer, if not longer. You will have the option of buying your
future warmers with or without a pod and so if you think yours needs replacing they will be widely
available.
I can see the red warning band but my warmer has charged fine – how much red band should I
be worried about?
A little of the red line is ok, but please keep watch if you do see a red line. The red line indicates
that the pod is expanding and pushing the lid up. If the warmer expands too much then you will
‘overcook’ it and you risk it bursting (just like if you put an egg in the microwave).
If you see the red line, note the time and stop it if it is 2mm or more.
I can see blue liquid in the pod – what shall I do?
If you see blue liquid in your pod, immediately stop the charging and do not open the pod until
it has fully cooled. This means that the warmer has overcooked and your warmer has burst. There
is a chance that due to pressure inside the warmer, that whilst it is still hot the liquid could spray
out. This is the reason for the safety arms and so these should lock if the warmer has pressure
inside, however it’s best to leave it alone until fully cooled to eliminate any risk.
If my warmer bursts will you replace it?
The pods have been designed to protect the warmer in the microwave. The warmers have also
been strengthened to withstand the pressure of the microwave, and so we know that if you follow
our guidelines for the microwave, then we know your warmer will not overcook. It is easy to over-
cook a warmer if you exceed or merge the times, or if you eliminate or reduce the shake stage(s).
Therefore, we cannot accept responsibility for your overcooked warmer.

what are the benefits of using yoomi vs. using a conventional bottle?
Whether you choose to bottle feed your baby or combine breast and bottle feeding, your yoomi
has been carefully designed to create a more natural bottle feeding experience that's comforting
for baby and convenient for you. A yoomi bottle can be used on its own or with a yoomi warmer.
Combined with a warmer, yoomi warms feed to the natural temperature of breast milk in 60 sec-
onds. Using the yoomi warmer means that your baby can be fed perfect ‘breast-milk’ temperature
feed in just 60 seconds anywhere, anytime – you don’t have to carry around any extra equipment
and you don’t have to rely on anyone else to help you warm your feed. It’s the most practical solu-
tion to feeding on-the-go.
how does yoomi make combination breast and bottle feeding easier?
Yoomi’s soft, silicone teat has been carefully designed to more closely resemble the contours of
mum's breast. Baby will be comforted by the ability to latch on easily, making it simpler to combine
breast and bottle feeding.
yoomi also facilitates combination feeding by gently warming baby's feed to breast milk tempera-
ture (32 to 34°C), which is a few degrees cooler than body temperature. Feed heated using other
methods, such as hot water or the microwave, tends to be over-heated (typically 40°C) and can
lead to baby preferring the hotter bottle feed to the cooler breast milk.
Unlike conventional bottles where the warm feed will cool down, feed with yoomi will remain at a
constant temperature making for a less interrupted and natural feeding experience.
can I use the yoomi bottle without the warmer?
Yes, the yoomi bottle can be used without the warmer.
my bottle leaks – what can I do?
The yoomi teats feature 6 air vents around the base which help reduce colic. Sometimes these
vents can get squashed if the bottle is tightened too much, or if the teat is not aligned correctly,
which can cause leaks. We suggest taking the bottle and collar, teats and warmer (if using) apart,
and reassembling following our tips shown in our demonstration video;
http://www.youtube.com/user/yoomibottle#p/a/u/2/Z9ZK7svETaU
the teat appears to collapse completely when my baby drinks from the bottle, is this normal?
No, this is not normal. The collar has been over-tightened preventing the anti-colic vents from work-
ing. Unscrew the collar by a quarter turn to ensure the vents are working.
can I microwave my yoomi bottles, teats and warmers?
yoomi bottles and teats can be placed in the microwave.
yoomi warmers CANNOT be placed in the microwave unless used with the yoomi pod.
can I place my yoomi bottles, teats and warmers in the dishwasher?
Yes, all yoomi parts can be placed in the dishwasher
yoomi bottles and teats

can I place my yoomi bottles, teats and warmers in the fridge?
Yes, all yoomi parts can be placed in the fridge
I’m struggling to find a teat that my baby will latch onto
We understand that not all babies like all teats but we’re confident that yoomi may be able to
help. The soft, naturally shaped teat is popular with babies and our built-in warmer creates a nat-
urally warm teat that makes yoomi a gentle way to introduce a first bottle to breastfed babies.
Check out “the yoomi promise” ... if your baby doesn’t like the yoomi teat and you cannot use
your yoomi products, let us know within 14 days of receipt and we’ll refund your order (UK only,
other T’s and C’s apply – contact [email protected]).

how do I prepare infant formula feed?
If preparing and storing infant formula feeds, please follow the latest FSA and DOH guidelines.
Powdered infant formula is not a sterile product, so correct preparation and handling is needed to
reduce the risk of illness.
what is the best way to transport feeds?
If it is not possible to make a fresh feed while out and about, feeds should be cooled in a fridge
(below 5°C) for at least 1 hour and transported in a cool bag. The yoomi bottle and warmer is fridge
friendly.
I go to work and cannot make up infant formula fresh feeds for each feed. How can I prepare and
store feeds in advance safely?
If ready to use formula feed is not practical, the FSA suggest you prepare feeds in separate bottles
and store in the back of the fridge at below 5°C. Feeds should never be stored for longer than 24
hours. The feed can then be warmed gently and safely using the yoomi bottle and warmer.
how does yoomi fit within the current guidelines?
The yoomi bottle (on its own) can be used to make up fresh feeds, just like any other feeding bottle.
Simply follow the Guidelines.
The yoomi bottle and warmer can be used for:
warming up expressed breast milk that has been stored in the fridge
warming up ready to use carton formula feeds
warming up feeds that have been prepared and stored safely in advance.
why do we think yoomi is the best warming system on the market?
Lots of reasons!
Safe & Hygienic - Conventional bottle warmers will warm the entire bottle of feed and so any bacte-
ria in the feed will start to multiply immediately upon warming. If baby takes an hour to drink its feed,
the bacteria has had an hour to multiply. The yoomi warmer only warms the feed the baby drinks,
leaving very little time for bacteria to breed. If baby takes an hour to feed, the feed will remain cool
until baby starts to drink, thereby minimising bacterial growth.
Quick – Conventional bottle warmers will take approx 6 minutes to warm fridge temperature milk.
Yoomi takes just 60 seconds, just what you need for those 3am night feeds.
Perfectly safe temperature – Unlike other warmers, there is no second guessing whether the temper-
ature is correct, yoomi warms to perfect breast milk temperature every time.
Portable – no plugs, no batteries and no more carrying around flasks of boiling water, yoomi is the
most practical solution to feeding on the go.
The Safer Option – the guidelines strongly recommend against using the microwave to warm feeds
due to the feed developing hot spots. Some parents are no longer using the microwave to warm
baby’s feed due to yoomi being just as quick but a safer option.
feeding guidelines

where is yoomi made?
yoomi is designed and assembled in London, England
what yoomi products are currently in your range?
Our range currently includes:
- the bottle (140ml or 240ml)
- super slow, slow, medium and fast flow teats
- the warmer
- starter packs (exclusive to yoomi.com)
- multi-packs (exclusive to yoomi.com)
- gift sets (exclusive to yoomi.com)
- yoomi charging pods
can I use the same warmer in the 5oz and 8oz bottle?
Yes, the warmer is interchangeable across the range
can I travel on a plane with yoomi?
Yes, yoomi is perfect for travelling, especially for long journeys where you may have difficulties
warming your baby’s milk.
We recommend that you take as many warmers as possible to cover your feeding requirements
whilst on a plane as you won’t be able to recharge them until after your flight.
The level of liquid inside the warmer is just under 100ml and so fine to travel with. It may be an idea
to take a copy of the yoomi instructions with you in case any customs officers want further informa-
tion. However many yoomi customers, and the yoomi team regularly fly with yoomi warmers.
can I recycle my yoomi products?
yoomi uses polypropylene plastic, which is ‘Grade 5’ - BPA free and recyclable.
The only part you cannot yet recycle is the warmer as the contents and the plastic need to be
disposed of separately to make them recyclable. Our team are working towards implementing a
recycling scheme – join the yoomi family to keep up to date with news.
how does yoomi help prevent colic?
The teat design features six built-in air vents which ensure that air does not bubble through the teat
and into the feed when baby drinks.
Make sure that you do not over-tighten the collar to ensure that the anti-colic vents work properly.
Watch our useful videos here (http://www.youtube.com/user/yoomibottle)
do yoomi products contain BPA (Bisphenol-A)?
No , they do not. All yoomi products are 100% BPA free.
what is Bitrex?
Bitrex is the brand name of a safe but bitter substance that has been added to the warmer to
ensure that baby will not swallow any of the solution in the warmer. To learn more about Bitrex®,
please visit www.bitrex.com
about yoomi