See, you're supposed to wear whitening strips every day for at least two weeks. In theory, this is a great idea. In practice, I can be lazy and forgetful. Things start off well, then my teeth get whiter, and after a few days, I forget to keep strippin'. Eventually, red wine brings back a few stains. But the good thing is, it takes only three or four days of strip-wearing for them to bounce back to a bright, natural hue. I fear using all of the strips in one fell swoop might make my chompers look too Optic White and fake, so this is a good plan if you want a more natural-looking gleam.
I use Crest 3D White Professional Effects strips for a few days each month, then use the mouthwash and toothpaste in between for maintenance. It's easy and gets rid of the corn-teeth look quite well, promise.
Source: Flickr user Let Ideas Compete