WARNING; beware product
I used the strips as directed for five days and the teeth were whitening.  No problems except excessive drool and unpleasant removal of remaining strip at end of thirty minutes.<br />Then at the end of the fifth day's use there were two chemical burns, each just under a half inch diameter each, on the inside of my lower lip.  I stopped use and called the company.  They were polite and apologetic giving me a complete monetary refund.  HOWEVER, it was a painful week before the sores healed especially the first two days when eating was difficult.<br />I would definately not recommend the strips, even if this was a rare occurance.[[ASIN:B000067E30 Crest Whitestrips Dental Whitening System, 56 Strips]]
Rating: 1 stars