I haven't had a problem with mine, but I've only had it a couple of months and probably only used if 20-25 times. It sounds like bromptonfb's idea would work, if there are issues inside, but I've also send a light (Joystick) back to Exposure and they changed it out without question. Speak with the shop you bought it from, maybe, get it checked in case there is a problem with your unit, if it's been logged before 6 months is up your warranty is more solid.