1. You’re not brushing your teeth for long enough
2. You’re brushing too hard
3. Your angle is off
4. Your toothbrush bristles are too firm
5. Your toothbrush head is too big
6. You’ve had the same toothbrush since last year
7. You don’t consider flossing mandatory
8. You think it’s no big deal to skip brushing your teeth before bed now and then
