And the yellow tint to my teeth will not for the life of me go away. I've been brushing all over the place, front, back, everywhere in my mouth. I still have a slight yellow tint when I examine after each attempt. The middle looks slightly better but the sides definitely have a more yellow tint to them. Is this normal? I'm trying to take better care of myself and I have no intention of visiting the damn dentist. Should I just keep brushing until it gets better? EDIT: UPDATE: I wont ever brush for half an hour again like you guys said. I'll only brush twice a day for five minutes every day. And I'll have a small glass of water after having acidic food/drinks.