I've had 2 airzounds and the same thing has happened to both of them: all I get when I press down on the trigger is an air sound. I don't know what happens, but after I fill them up the 3rd or 4th time, I can't get any more sound out of it. I've tried moving the little orange thingy on the side, but that didn't make any difference.

Has anyone else had / solved this problem?