S.P.
This should already be part of the routine, that is one mistake. You should use the baby toothpaste that you can just rub on and massage the gums good. You will have all kinds of trouble with his teeth if you don't. Once you have him used to that on a routine, you can move him up to a baby toothbrush. He probably won't mind the finger in his mouth as much as a toothbrush right now. His sippy cup should have water in it before bed. I don't think it's good to get a child used to all the protein before bedtime, it's a bad habit.