I brush my teeth regularly, twice a day, plus flossing and mouthwash. The works! But it's just not doing anything! My teeth and rotting from the inside out and I have no idea why or how to stop it. I've taken to brushing my teeth after every time I eat something, but I just don't get it. Two of my bottom teeth have holes in the base and I can feel that the same will happen to all the other teeth pretty soon. Any idea what this is? Any idea what I can do?