We asked dentists about the best teeth-whitening products, kits, and gels. Here’s what kind of results you can expect, and how to prevent gum sensitivity.

Prime Day ends tonight and deals keep getting better from Apple, Kindle, Dyson and more. We're tracking prices live to bring you the best, most worthwhile deals.

Yes, Prime Day is still going on, and yes, there's still really good (and brand-new) deals available. I'm sifting through them in real-time to find ones you should care about.