Well I borrowed a pair of channel locks from a neighbor and got it off, that didn't help but looking down the pipe the AAV was screwed into I saw a huge glob of stuff where the sink drains enters. I took it all apart and found the pipe from the p-trap to the drain stack half full of nasty gunk. I have no idea how that stuff wasn't in the p-trap but it was clean so I figured the rest of the pipe was too. Anyway after a good cleaning its all working. How can I keep that stuff from clogging the pipes up?