Whitening Strips & Mouth Closure: What You Need to Know

No, you cannot close your mouth when you have whitening strips on your teeth. Whitening strips are usually applied to the front surface of your teeth, and they need to be exposed to空气in order to work effectively. Closing your mouth would prevent the strips from getting the oxygen they need, and it would also trap moisture against your teeth, which could cause the strips to dissolve prematurely.