I have an 18 month year old, he has 16 teeth and I'm having a real problem with cleaning them...as in he is not interested.
I have tried pinning him down (to which he screams the place down) and also letting him try it himself - lying down, sitting down and standing up. He just chews the brush, sucks of the toothpaste and throws it away.
I've done the getting cross, the pos reinforcement, the brushing mine at the same time but nothing seems to be working. 
I really don't know what to do...any advice greatly appreciated.
Thank you