Actually, he never started. LOL. I could actually stick my hole head in his old cage with him still in it as well as this new one and he just gives me this "so what? you want a prize?" look.
The only time he gets nippy is when I touch a sensitive area while preening him. He will BITE hard when he thinks I'm trying to take a treat away or something (like trying to clean up bread crumbs near him while he's eating the bread. So now I wait til he's away from the area to clean it up.
That is probably the ONLY thing I don't like about him - is how nasty he is to everyone else. When I used to have caseworkers here four days a week, he was very friendly with them and would let them hold him and pet him. Once they stopped coming, he became very possessive of me. I live alone and RARELY have company - even when I do they don't stay long. So he is not used to other people anymore. I hate that, but with my current life situation, there ain't much I can do to change that.