Did a search but didn't find anything. I have been having problems putting air into the negative air chamber on my Reba. When I screw the pump on it lets all the air out of the chamber, and when I unscrew it it lets a lot of air out of the chamber. I never really know how much air I have in the neg chamber. I don't have this problem with the positive chamber. Has anyone else experienced this, or have any idea on what to do? Thanks, in advance.