I will probably get jumped on from a great height with my solution, but here goes - it cured my son. He is 42 now and doesn't bite any more !! Babies at 2 - and they are still babies - have no idea of cause and effect. They like the feeling of flesh between their teeth and don't know that it hurts. Try your teeth on her to let her know how it feels to be on the receiving end. I am not suggesting drawing blood or even leaving any marks - just give her an idea of what its like.