
The Philips Avent 3-in-1 Electric Steam Sterilizer is a practical and efficient solution for sterilizing baby bottles and other feeding accessories. It is designed to effectively eliminate harmful bacteria, ensuring the safety of your baby's feeding supplies. Depending on the water type in your area, limescale can appear on your appliance over time. Although it is not harmful, it is unsightly, hard to clean, and can impair the operation of appliances or damage their components if allowed to build up. To descale your Philips Avent Sterilizer, you can choose one of two methods: using a descaling solution of citric acid and water or a solution of white vinegar and water.
| Characteristics | Values |
|---|---|
| Frequency of descaling | Every 1-2 weeks or every 4 weeks |
| Type of descaling solution | Citric acid or white vinegar |
| Amount of citric acid | 10 grams |
| Amount of water for citric acid solution | 200 ml |
| Amount of vinegar | 100 ml |
| Amount of water for vinegar solution | 200 ml |
| Instructions for citric acid solution | Mix citric acid and water, pour into the unit, switch on for 1-2 minutes, unplug, let stand for 30 minutes, drain and rinse, run a full cycle with 90 ml of water |
| Instructions for vinegar solution | Pour vinegar and water solution into the unit, let stand without switching on until lime scale dissolves, drain and rinse, run a full cycle with 90 ml of water |
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What You'll Learn

How often to descale
It is important to descale your Avent electric steam sterilizer regularly to ensure it functions properly and remains free of limescale buildup. The frequency of descaling will depend on a few factors, including the hardness of your water and how often you use the sterilizer.
If you live in an area with hard water, limescale can build up more quickly, so you may need to descale your sterilizer more frequently. Similarly, if you use your sterilizer daily, it will likely require descaling more often than if it is used only occasionally.
As a general guideline, it is recommended to descale your Avent electric steam sterilizer at least once a month, or more frequently if you notice any of the following signs:
- The sterilizer is taking longer than usual to heat up or cool down
- There is visible limescale buildup inside the unit
- The sterilizer is producing less steam than usual
- The unit emits an unusual odour
Descaling your Avent electric steam sterilizer is a simple process and can be done using either citric acid or white vinegar. Here are the step-by-step instructions for both methods:
Method 1: Citric Acid
- Mix one sachet (10 grams) of citric acid with 200ml of water.
- Pour the mixture into the empty sterilizer unit and do not put the lid on.
- Switch on the unit for 1-2 minutes, then unplug it from the mains.
- Let the mixture stand in the unit for 30 minutes, then drain and rinse the unit.
- Run a full cycle with the baskets/racks inside and the lid on, using exactly 90ml of water.
Method 2: White Vinegar
- Mix 100ml of white vinegar with 200ml of cold water.
- Pour the mixture into the sterilizer and do not switch it on.
- Allow it to stand until the limescale has dissolved, then drain and rinse the unit.
- Run a full cycle with the baskets/racks inside and the lid on, using exactly 90ml of water.
By following these descaling instructions and maintaining a regular descaling schedule, you can ensure that your Avent electric steam sterilizer remains in good working condition.
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What products to use
It is important to descale your electric steam steriliser at least every 1-2 weeks to ensure that it continues to work effectively. Regular descaling is recommended every 4 weeks or when you notice an excessive build-up of mineral deposits.
To descale your Philips Avent electric steam steriliser, you can use a descaling solution of white vinegar and water, or citric acid and water.
For the vinegar method, mix 100ml of white vinegar with 200ml of cold water and pour the solution into the steriliser base up to the descaling mark. Do not put the lid on. Leave the solution to stand in the unit until the limescale has dissolved. Drain and rinse the unit, then run a full cycle with baskets/racks inside and the lid on, using exactly 90ml of water.
For the citric acid method, mix one sachet (10 grams) of citric acid with 200ml of water. Pour the solution into the empty unit and switch it on for 1-2 minutes. Unplug the unit from the mains and leave it to stand for 30 minutes. Drain and rinse the unit, then run a full cycle with baskets/racks inside and the lid on, using exactly 90ml of water.
It is important not to use any descaler other than citric acid or white vinegar, as other products may damage the unit.
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Preparing the solution
To descale your Avent electric steam steriliser, you need to prepare a descaling solution. Depending on the method you choose, you can use citric acid or white vinegar. Here is how you can prepare the solution:
Using Citric Acid
Mix one sachet (10 grams) of citric acid with 200ml of water. Do not put the lid on the unit after pouring in the mixture. Switch the unit on for 1-2 minutes, then unplug it from the mains and let the solution stand for 30 minutes. After 30 minutes, drain and rinse the unit. Finally, run a full cycle with the baskets/racks inside and the lid on, using exactly 90ml of water.
Using White Vinegar
Mix 100ml of white vinegar with 200ml of cold water and pour the solution into the steriliser. Allow the mixture to stand in the unit until the limescale has dissolved. Do not switch the unit on during this step. Once the limescale has dissolved, drain and rinse the unit. As with the previous method, run a full cycle with the baskets/racks inside and the lid on, using 90ml of water.
It is important to descale your steriliser regularly, at least once every 1-2 weeks, to ensure optimal performance. If you live in an area with hard water, limescale can build up more quickly, so you may need to descale more frequently.
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Running the cycle
To descale your Avent electric steam steriliser, you can use a descaling solution of white vinegar and water or a solution of citric acid and water.
For the vinegar method, mix 100ml of white vinegar with 200ml of cold water and pour it into the steriliser base up to the descaling mark. Do not put the lid on the unit. Allow the solution to stand in the unit until the limescale has dissolved. Do not switch the unit on during this time. Once the limescale has been removed, drain and rinse the unit. Then, run a full cycle with the baskets/racks inside, the lid on, and using exactly 90ml of water.
For the citric acid method, mix one sachet (10 grams) of citric acid with 200ml of water and pour it into the empty unit. Again, do not put the lid on. Switch the unit on for 1-2 minutes, then unplug it from the mains and leave it to stand for 30 minutes. Drain and rinse the unit. Finally, run a full cycle with the baskets/racks inside, the lid on, and using exactly 90ml of water.
Regular descaling is recommended every four weeks or when you notice an excessive build-up of mineral deposits. This will ensure that your steriliser continues to work effectively.
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Rinsing the unit
First, you will need to drain the descaling solution from the unit. If you have followed the recommended descaling method, this solution will be made of white vinegar and water. It is important to ensure that all of the descaling solution has been drained from the unit before proceeding.
Once drained, you should rinse the unit thoroughly with clean water. Pay close attention to the areas where the descaling solution was poured in and ensure that all traces of the solution are rinsed away.
After rinsing, you will need to run a full sterilisation cycle with the baskets/racks inside and the lid on. For this cycle, you should use exactly 90ml of water. This step is important to ensure that any remaining traces of the descaling solution are removed and that your steriliser is ready for its next use.
By following these steps for rinsing the unit, you can ensure that your Avent electric steam steriliser is thoroughly descaled and maintained in good working condition. Regular descaling, every 1-2 weeks or at least every 4 weeks, will help to prevent limescale buildup and keep your steriliser functioning effectively.
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Frequently asked questions
It is recommended to descale your Avent electric steam sterilizer at least once every 1-2 weeks or every 4 weeks, depending on the source of information.
You can descale your Avent electric steam sterilizer by using a descaling solution of white vinegar and water or a mixture of citric acid and water. Pour the solution into the sterilizer base and run a complete sterilization cycle without any items inside. Once the cycle is complete, rinse the sterilizer thoroughly with clean water.
If you don't descale your Avent electric steam sterilizer regularly, limescale can build up over time. While limescale is not harmful, it can be unsightly, difficult to clean, and may impair the operation of your sterilizer or damage its components if allowed to accumulate.












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