My Philips Sonicare AirFloss makes a whistling sound
We recommend that you follow the steps in the order listed below. In between steps, check to see if the issue is resolved before moving to the next.
1. Clean the reservoir vent.
To clean the vent, follow the steps below:
- Take a damp/moist paper towel or cotton swab.
- Wipe along the inside edge of the reservoir door opening, especially on the top area.
- Rinse well with cold tap water and ensure that no debris/dust is left.