Steri-Steam Electric Steam Sterilizer



Do you have a question about using your Tommee Tippee Electric Steam Sterilizer? Find the answers here.

This sterilizer is designed for use with Tommee Tippee bottles and feeding accessories (except the bottle brush). The sterilizer will hold a maximum of 6 Tommee Tippee bottles or a combination of fewer bottles plus soothers and breast pump parts.


A step by step guide to all the component parts, how they fit together and what they do.



Clean your electric sterilizer before first use (refer to the cleaning instructions below).


  1. Remove all items from inside the sterilizer base.
  2. Pour exactly 80ml of water into the sterilizer base.
  3. Assemble  the lower tray (A) with logo facing the front and upper tray (B) and place in the sterilizer base.
  4. And the lid.
  5. Connect the power lead and plug into the mains supply. Switch on at mains supply.
  6. Press the power button (play) and it will light up amber to show the sterilizing has begun.
  7. The light will switch off when sterilizing has finished.
  8. Allow to cool for 5 minutes before turning off at the mains, removing the plug and sterilizer lid.
  9. Remove the upper and lower trays, pour away any remaining water and wipe dry. Your sterilizer is now ready to use.


Before sterilization, wash all bottles and feeding accessories in warm soapy water or in a dishwasher (top rack only) to remove any milk residues. Separate all components for washing and reassemble teat and screw ring for sterilizing.

  1. Place on a flat, heat resistant work surface. Pour exactly 80ml of water into the sterilizer base. Your Tommee Tippee bottles have a handy 80ml measure to help you.
  2. During the sterilization process hot steam passes through the vent at the back of your sterilizer, so position it away from walls and make sure it is not underneath any overhanging shelves or cabinets.
  3. Assemble the lower tray into the sterilizer base with the Tommee Tippee logo facing forwards on the right-hand side.
  4. Place the bottles neck downwards into the locators of the removable tray. This includes locators for advanced anti-colic valves.
  5. Place the upper tray onto the lower tray.
  6. Place the assembled teats and screw rings onto the upper tray. It is important not to have the hoods fitted onto the teats and screw rings.
  7. Slot the hoods into the hood locators of the removable upper tray so that they hang over the teats and screw rings but are not fully assembled.
  8. Place the lid onto the sterilizer base and plug the power lead into the mains power.
  9. Press the power button (play) to start the machine. An amber light will come on. This shows that the sterilizer is in its warm-up phase and will automatically begin the sterilizing phase when it reaches the appropriate temperature.
  10. When the sterilizing stage finishes, the light will automatically switch off.
  11. The stop button is there in case you need to manually stop your sterilizer mid cycle. If you do this you will have to restart the sterilizing process from the beginning as the contents will not be sterilized.
  12. After the cycle has finished, allow your sterilizer to cool for at least 5 minutes before opening. We recommend that you hold the lid by the two side handles, lift vertically until you have cleared the upper tray then tilt the lid away from you to allow the water to drain.
  13. The contents will remain sterile for 24 hours if the sterilizer is unopened.
  14. Wash your hands thoroughly before handling the sterilized items. Take care as the items may be hot. You can use teat tongs to remove small items.
  15. You can use the trays separately as a drying rack or sterile surface.
  16. To help in the reduction of limescale, pour away any remaining water from the base and wipe it dry with a soft cloth after every use.  



To clean your electric steam sterilizer

Unplug and allow to cool before cleaning. After each use pour away any remaining water from the sterilizer base by tipping it sideways over a sink. Wipe clean with a damp cloth only. Do not clean with abrasive cleaners or allow it to come into contact with solvents or harsh chemicals as this could cause damage.

To descale your electric steam sterilizer

A build-up of limescale can negatively affect the performance of your sterilizer. To keep it working effectively we recommend carrying out the descaling process using these frequency guidelines:

Hard water: 14 days

Medium: 21 days

Soft: 28 days

You can find out your water quality via your water provider. Living in a hard water area can produce limescale more quickly, so we recommend descaling more frequently.

  1. After each use pour away any remaining water from the base by tipping it sideways over a sink and wipe with a damp cloth only. 
  2. Use a descaler that is suitable for use with stainless steel and use as per the manufacturer’s guidelines. 
  3. Alternatively you can use white vinegar or a descaling sachet to descale your unit. Please use as per manufacturer’s guidelines.
  4. Where no method is stated, use 1 sachet of descaler to 200ml of hot water. 
  5. Once you have descaled then follow the set-up instructions to perform a final cleaning cycle. 

DO NOT use metal objects or scourers to clean your sterilizer.

DO NOT use bleach or sterilizing fluid to clean. DO NOT use abrasive or anti-bacterial materials. DO NOT scrub the heat plate.

Why should I descale?

De-scaling removes the limescale that can build up around the heat plate, just as it can inside a kettle. Descaling regularly helps your sterilizer enjoy a long and happy life, with no bits fading before their time.

How do I descale?

We recommend using a descaler that is suitable for use with stainless steel and following the manufacturer’s instructions. However, you can use white vinegar if you prefer. If there are no instructions, we recommend using 1 sachet to 200ml of hot water. 

How often should I descale?

This really does depend on the area in which you live. If the water in your area is hard then you may need to descale every 14 days. If it’s medium, then you’ll need to descale every 21 days and if the water is soft it’s around every 28 days. If you do notice any limescale before the descale is due, you can descale your steriliser earlier or more frequently. You can find out the quality of your water from your water provider.

How should I store my sterilizer?

If you want to store your sterilizer to use again, we’d suggest that you run a full descaling programme to ensure all limescale is removed and to give it a clean. Ensure the unit is thoroughly dry and securely wrapped in bubble wrap and cardboard to keep it nice and snug. When deciding where to store it, we’d suggest somewhere nice and dry to avoid any damage.


My sterilizer isn't working - what can I do?
  • Check the mains lead is plugged into the unit and the mains socket is switched on.
  • Check the fuse is in the plug (in a UK plug only). 
  • Check the socket by plugging in another appliance. 
  • Check the sterilizing by plugging it into another socket.
Help my sterilizer is producing a lot of steam

Check that bottles and other items are correctly loaded in the trays of your sterilizer.

Use exactly 80ml of water in your sterilizer. More than 80ml of water in the sterilizer base will increase the cycle time. Less than 80ml may not sterilize the items properly.

Don’t overfill the machine with too many products as this reduces how efficiently the sterilizer works and it may not sterilize properly.

My bottles are coming out of the sterilizer with a mark

If you are seeing chalky residue on items in your sterilizer, that’s a sign that it needs descaling. Refer to the descaling instructions.

Should I get a lot of steam whilst it's on?

Not really. If you have way more steam than you’d expect, it could be that you’ve just got a few too many items inside. Check that items are correctly loaded into the sterilizer. There are marked areas on the trays to show where to put your bottles, and if you’re popping other items like teethers or soothers in, just be sure to space these out evenly.

Don’t overfill the machine with too many products as this reduces how efficiently the sterilizer works and it may not sterilize properly. The correct amount of water is 80ml. More than 80ml of water in the sterilizer base will increase the cycle time. Less than 80ml may not sterilize the items properly.

There are flaky bits in the machine - what's causing it?

This is likely to be a build-up of limescale that’s loosened from the base of your machine (we call it the heat plate) so we’d recommend giving it a good descale. We recommend using a descaler that is suitable for use with stainless steel and following the manufacturer instructions. However, you can use white vinegar if you prefer or a descaling sachet. If there are no instructions, we recommend 1 sachet to 200ml of hot water.

Should there be water left in the bottom once its finished?

Yes - that’s pretty common. Just empty it out once you’re finished and dry thoroughly so you’re ready to use again.

Why do my bottles still have marks on after I sterilize?

The chances are the marks are milk residue. Sterilizing removes bacteria, but bottles still need to be washed beforehand to remove any bits of milk clinging on inside. Warm soapy water will do the trick. Thoroughly wash, then rinse and pop them in your sterilizer.

There are holes appearing in the base (heatplate) - what's causing this?

If you haven’t been using a water softener, cleaning chemicals or sterilization solutions, then it sounds like there may be or has been an excessive amount of limescale build-up, which has damaged the heat plate. If you haven’t already descaled your machine, it’s still worth doing this, as once the limescale is clear, you can see the extent of the holes (we call this pitting).

Once the descaling process is complete, have a look at the volume of holes that are visible. If there are several holes, we’d recommend that you stop using the machine as the heat plate has been damaged. If there are only a couple and as long as the machine is still functioning as it should, you can continue using the machine, but we advise to regularly descale and watch out for any more holes appearing. Stop using if more appear.

To help you out further – here’s an image of a heat plate with only a small amount of pitting (A) and another with excessive pitting, where the machine should not be used (B).


Please click on the link below and download the Electric Steam Sterilizer Product Manual.


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