DD is 20 months old and absolutely refuses to brush her teeth. We have tried various things like a special brush/ toothpaste, having her sister model, different times of day other than bedtime and making it into a game. She essentially clenches her jaw and doesn't allow the brush in. The only way I get her to brush is to force it when she's hysterical crying and screaming "yucky yucky yucky!" I don't know what to do it's the worst part of my day