Speed: 1. Charge the device for 3 hours before first use. 2. Fill the 300ML water tank with warm water. 3. Select the appropriate tip and pressure setting. 4. Lean over the sink and place the tip in your mouth. 5. Turn on the device and maneuver the tip along your gumline and between teeth. 6. After use, remove the tip and rinse the device. 7. Allow the device to air dry with the tip off.