I see baiting as a real test of DBing and I think that spouses use it subconsciously to test the waters. When your H baits you, your alarms bells should be going off in your head, ringing "careful, careful, careful". Then think about what your goal is and whether what you want to say/do is going to get you closer to your goal.
If you can pull it off, IMO the best way to deal with it would be to act as if he was gently poking fun at you (which I know he's not, he's probably just indulging in some meanness), and react with some non-snarky, self-deprecating humour. That would be a great illustration that you have changed. You don't want to fight, you want to have fun. If you can't pull off humour, try to react with dignity...instead of defending yourself, act suddenly bored/distracted and leave the room (not in a punishing way). That leaves him alone to figure out if that's the result that he wanted. "Defense is the first act of war" -- Byron Katie
