How come we as a species have yet to really crack the code on teeth whitening? Or maybe we've cracked the code too many different way. To teeth whitening people are like, well, I don't know. Do you want to drag a gooey pin all over your teeth? You want to put a nasty strip in there? There's 19 different websites that all pretty much say the same thing. One place says teethdirect.biz says, this is the best one. And then every other one is like, don't do this. It makes your teeth brown. Oh, no, that's the opposite of what you want. Then there's one that's like,