Question: how long do you leave teeth whitener on your teeth?
Answer: Opalescence PF 10% should be removed after 8-10 hours during the day/night. 15% and 20% can be worn 2-4 hours during the day. HOWEVER, anything over 35% should be removed after 30 minutes. Trèswhite Supreme may be worn for 30-60 minutes a day.