So far not having this problem, but having another ...keeping my B&W filter clean. I probably spent 5 mins today spraying, wiping, respraying, rewiping, what a pain. Bought it off ebay so hope it's not a knock off. But even with this inconvenience my heart can't handle the stress of exposed shooting, Even if i'm inside! Thought I found a tiny scratch on the front glass and it sunk my heart!