Not only does our compact interdental brush go where a toothbrush just can't go, it goes wherever you go, too.The best part is, each of these brushes come with a cap that can be used as an extension to reach teeth all the way at the back. Insert the brush gently into the spaces between your teeth. , , Do not force. With a gentle, straight back and forth motion, use the brush to remove food particles and plaque from spaces in between teeth. Rinse your mouth with water or mouth rinse. Clean the brush under running water after each use. Use the cap as a handle extension for hard to reach areas. Replace the brush when the bristles fray.