Troubleshooting My Philips Sonicare AirFloss is not turning on If your Philips Sonicare AirFloss is not turning on, below you will find a couple solutions that you can try yourself. Turn the power button on Press the power button to ensure your Sonicare AirFloss is on. Place it on the charger If your AirFloss is still not turning on, you can try charging the device by plugging the charger into a live outlet and place your AirFloss on the charger. Charging process: 1 green LED: 33% charged 2 green LED: 66% charged 3 green LED: 100% charged Note: If you are using your Sonicare AirFloss for the first time, ensure that it is charged for 24 hours. Note: When the charge indicators flash yellow, the battery is low and needs to be recharged (fewer than 3 uses left). Still not turning on or have questions? Contact our Consumer Care Agents for further assistance or visit our support page.