slippery poor product design not worth the cost savings over the crest d strips [SEP] i do not know why i try these after trying and loving the crest d strips but it was a big mistake these do not stick properly they slide around they are loaded with some gel intended to make them taste pleasant which i do not like either in general interest seems like really poor product design i would definitely pay a little more for the crest d strips over these i may even throw away the rest of my box grrr