What good at-home teeth whiteners have you found?
I've used a few, but their effectiveness starts to wear off. Are there any you've found to be effective after several uses (i.e., several months apart)?
The best answer
Crest has this whitening strip that you put on every night for 10 minutes. I used it a couple of years ago, and it was noticeable. Costco has a good deal on them.