Place the convex side against the surface of the tongue and gently draw it from the back toward the front several times. Use the concave side for the sides of the tongue, repeating the same gentle back-to-front motion. Use for approximately 20–30 seconds in the morning and evening.
Do not rub firmly or insert the brush too far back, as this may cause nausea. The tongue papillae are delicate, particularly toward the back; take care when feeling unwell or when the tongue is irritated. Stop using if any unusual changes occur on the tongue or if the brush loops do not agree with you. Do not use a broken or damaged brush.