Use: Move floss up and down against each tooth. Clean below gum line rinse floss as needed replace head daily. Snap Off: Place handle on hard surface. Put finger on neck or handle. Press down gently to release. Snap On: With floss facing up, insert handle with Reach side up through the center of the head. Align notches and push down to snap in place. For ages 6 and up. Use with adult supervision.