My 18-month-old DD refuses to let me brush her teeth. When I try, she turns her head, clenches her jaw shut, and cries/screams. She will "brush" them herself, but this consists of sucking the toothpaste out of the brush and maybe hitting a couple of front teeth in the process. I've tried making a game out of it, singing a song that involves opening the mouth, showing her how I brush mine and trying to get her to copy, explaining to her that she *needs* to let me brush them (yeah, that helps a LOT with a toddler, let me tell ya!). Nothing works. Any suggestions on how to keep her teeth healthy if she won't let me near them?