I suggest taking it apart.Just ebough to get to the lens.I f you take it apart.Get some rubbing alcohol and a Q-Tip(clean) and dip moistend the q-tip with a little bit of alcohol.Clean the lens with up and down motions.If you have any electronic cleaner,yoou could spray that in there.It wouldn't hurt.Dry off the the lens with another clean q-tip.Put it back together and see if anything happens.Good Luck