Benefits of home teeth whitening. If you do the whitening process yourself, naturally it will eliminate the need to visit a dentist and pay significantly more money for the same results. The convenience of home whitening kits is the main appeal, with some even allowing you to use them while you sleep, as long as you follow the directions and apply the mouthguard properly. Moreover, a lot of people feel anxious around dentists, so this option would be a way for those individuals to not have to make yet another undesirable trip to the dentist’s office.