Gently insert the brush horizontally between teeth and move it back and forth several times. Do not force it into a gap.
When bending the brush for use, bend it slowly and gently. Bending the wire makes it more likely to break. To extend the handle with the cap, insert it firmly all the way.
If a gap is too narrow for easy insertion, do not force the brush in or bend or rotate the wire, as this may injure the gums or cause the wire to break and be swallowed.
After use, rinse thoroughly under running water, drain off the water, and store in a well-ventilated place. Use only for cleaning between teeth.
Bleeding may occur when first using the brush. If gum pain or bleeding continues during use, consult a dentist. Keep out of reach of infants and young children.