Troubleshooting My Philips Sonicare AirFloss handle needs frequent recharging If you find that you need to recharge your Philips Sonicare AirFloss frequently, check out our tips below on how you can fix this. Charging your AirFloss If this is your first time using the AirFloss, it is important to charge it for 24 hours before using. Another tip to ensure that your AirfFloss stays charged, leave it on the charger when not in use. Leaving it on the charger will not damage your AirFloss. Note: When it is fully charged, AirFloss has an operating time of up to 2 weeks (or 14 uses). Note: When the charge indicator flashes yellow, the battery is low and needs to be recharged (fewer than 3 uses left).