I confess that I don't do it every night before bed! Gross, huh, but no cavities! Actually, i really do try to, but in the morning I have horrible morning breath if I did brush my teeth. wierd, huh? anyone else have that problem? I also have really sensitive gums that are prone to receed if i brush too often (as told me by my dentist, hence I had to have my gums grafted). so, when i do brush in the morning, and usually later, too, I give it a really good and thorough brush