Hi, Hazel,
I would recommend that, as much as possible, you ignore him when he is egging you on.
Then, at other times when he is being good, try to say nice things to him and/or to initiate doing something that you know he likes - for example, offer to play a game with him or take a walk, or whatever you know he enjoys.
If you can manage that, you will reinforce his good behavior and minimize the bad. I hope this works out for you!
If all else fails, escape to your room or some other quiet place... ;) Good luck!
P.S. I'm a parent, grandparent, and great-grandparent.... ;)