Will drop from 2000 to 1000 overnite. Cant seem to locate leak. Gun was not used for several months . Got it out and it was ,low, but i dont remember where it was when i put it up last fall.i thought i would air it up and shoot it . Now it is losing air overnite. I havent had it go dry. Maybe it will. Any experience with similar problem. Ive checked fill and sprayed around . Just dont see the leak.