When it's about 6 p.m. and I start making dinner, I sometimes find it hard to resist snacking. If this sounds familiar then here's an odd, but effective trick to keep you from munching. Try wearing Crest Whitestrips while you cook. For the 30 minutes they're in your mouth, you cannot eat or drink. It'll take you about that long to prepare your meal. By the time you're ready to eat, you can remove the strips and your appetite won't be spoiled with mindless snacking.