Lately I have been struggling over tooth-brushing with my 2 1/2 year old. I used to be able to get him to let me brush his teeth. Then we had a few nights where he resisted and because it was late I gave in. Now, he has been resisting every night. He won't open his mouth and if I try to force it he cries and I feel terrible. My old trick aren't working. Does anyone have tips for brushing toddlers teeth? Please Help!