Is sleeping with Crest white strips on harmful?

I would highly recommend against sleeping with Crest Whitestrips on for several reasons: 1. Even the manufacturer recommends a limit on the time for the strips to be in yOur mouth and having contact with your teeth. 2. Excess sensitivity. 3. No real gain in whitening quickness as the effective chemistry is used up and broken down. 4. read more

My friend did it with different ones and it didn't hurt her. read more

My daughter put teeth whitening strips on that's are My daughter put teeth whitening strips on that's are supposed to be on for 1 hour,,, and fell asleep so they were left on for 5-6 hours now she is in terrible pain. read more