I have spoken to two men.. sounding Indian .,. I cannot understand them and they want access to my computer.. all my numbers.. email addresses.. house address. ALL I want is to complain about Crest 3D white strips... I cannot always get one or the other removed from it's backing. I have used these for years... so DO know how to use them. If there is any satisfaction from you and NOT talking to some ( 2 ) men that I cannot understand.. I would appreciate it. Otherwise, I will no longer buy them for myself , or my husband . My name is Joan Cole.. email: [email protected]. Thank you for any attention you will give to me and this matter. Joan M. Cole