Speed: 1. Charge the device fully before first use and every 30 days of use. 2. Remove water tank fill it with warm water. 3. Select one 3 pressure modes using mode button. 4. Place tip in your mouth close lips to form a tight seal. 5. Lean over sink turn on flosser. 6. Move along gum line teeth, pausing briefly each tooth. 7. After use, remove rinse under clean 8. Store dry place keep away from when not