My 3 year old, who always has been fantastic sleeper, started getting up in the night just before baby sister born. 8 months later he's still at it arghhh! He has gate across his door so he can't get into our room, and he will just turn around and go back to bed OK when we come to him. But this can be 3 times a night. Sure it is just habit and have tried stickers, treats, withdrawal of privileges, you name it. He also gets so frustrated with himself for doing it. At a loss - can you help??