Well I just figured something out. I have my fermenters in a large tub of water to keep the temp from fluctuating. I am using a 3 peace air lock, and the part that moves up and down just stays up at the top of the air lock. It still bubbles because I guess it builds up enough pressure to squeeze some out. If I apply slight pressure to the top of the bucket it bubbles and falls to the bottom of the air lock like it should. When I lift the Ale pale out of the tub of water the part that moves up and down falls to the bottom. So I assume the pressure of the out side water (tub water) is pushing on the side of the bucket. So if anyone is planning on doing the tub trick this summer I think you should wait and fill the air lock with water after you have put the fermenter in the tub of water. This will prevent you from what is happening to me. Mine should still be ok but it has to build up some pressure against the top of the air lock to bubble. Peace. (I hope this makes sense)