How to Descale the Avent Steam Sterilizer

The Avent Steam Sterilizer is a handy tool for moms who need a quick way to disinfect bottles, lids and breast pump parts. Over time, mineral deposits (lime scale) will accumulate within the machine and around the heating coil. These deposits may be particularly heavy when hard water is used. Avent recommends descaling the sterilizer once a month to keep it at optimum effectiveness.

Things You'll Need

  • Citric acid
  • Water
  • White vinegar

Instructions

  1. Citric Acid Method

    • 1

      Combine a 10g packet of citric acid and 200 mL of water. Remove the sterilizer's cover and transfer the mixture to the empty machine. Citric acid is available at pharmacies.

    • 2

      Turn on Mode 1. Allow the sterilizer to run uncovered for one to two minutes.

    • 3

      Disconnect the unit and set it aside for half an hour.

    • 4

      Pour out the citric acid mixture and run clean water through the sterilizer.

    • 5

      Replace the cover and activate a complete sterilizing cycle using precisely 90 mL of water. Do not attempt to sterilize any bottles or other equipment at this time.

    White Vinegar Method

    • 6

      Combine 200 mL of cool water with 100 mL of white vinegar and add the mixture to the machine.

    • 7

      Leave the mixture in the machine until the lime scale disappears. Avoid turning on the power during this process.

    • 8

      Empty the machine and clean it well.

    • 9

      Replace the cover and activate a complete sterilizing cycle using 90 mL of water. Do not sterilize any bottles or other equipment at this time.

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