[Bonka]

I've used the Crest strips as well as having my teeth bleached after I had my braces removed - years of sriracha and sambal olek takes its toll :/. If regular cleaning doesn't take away the stains, the strips are the mildest whiteners to use that actually work well. I didn't notice too much sensitivity afterwards using both the 7 and 14(?) day packages but I would really use it sparingly and just avoid teeth staining foods, drinks and condiments. Also they only clean the incisors and maybe the bicuspids so if you're molars and brown and yellow and you really want them white consider more drastic measures.