Troubleshooting The AirFloss produces a burst of air but no water/mouthwash comes out If your Philips Sonicare AirFloss is discharging air but no water/mouthwash is coming out, you can find a few tips on how you can solve this issue below. Hold the handle in an upright position When using your Sonicare AirFloss, it is important to hold the handle in an upright position. Tilting the handle horizontally can block the water from getting into the nozzle. Empty the reservoir and refill If you have not used the device for a while, follow the steps below: Empty the reservoir and refill with lukewarm water Turn on the AirFloss by pressing the power button Press the burst activation button until water comes out of the nozzle Tip: Use the 3-burst mode setting to speed up this process Note: If you are planning to not use your AirFloss for a while, we recommend emptying the reservoir when storing. Still have questions? Contact our Consumer Care Agents for further assistance or visit our support page.