I took the aire sdp out last week and after the trip, as usual, I inflated it in the garage to let it dry-out before storing. I noticed the next morning that the floor had gone almost completely flat. I pumped it back up and now it's flat again. I did notice the pressure relief valve hissing after inflation this last time. Is there an easy solution to this? I suppose I should just remove the air cells from the floor and make sure there's not a rock, grit of sand, etc. in the valve or something? Anything I should be careful of when removing the cell?
Thanks in advance.