Brush your teeth, and dry your teeth with a tissue.

Remove cap and twist the bottom of the pen clockwise( to the right ) until a little gel flows from the gel chamber onto the brush. For first use you may need more twisting.

Apply a thin layer of the whitening serum to each tooth surface, smile wide keeping lips away from your teeth for 30 seconds.

After 20-30 minutes, rinse your mouth with water. Avoid eating or drinking for 30 minutes after treatment.