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Author Message   Tom_cheshire Tinkerer Username: Tom_cheshire Post Number: 277 Registered: 04-2009 Rating: N/A Votes: 0 Posted on Sunday, February 21, 2010 - 05:56 pm:    "Electronics cleaner" is a type of spray that dries "clean". At worst, it maybe leaves a white-ish haze on metal. Not all electronics cleaners are alike. Some cheaper ones are greasy or oily and do not dry (like one from Radio Shack). Some brand names of the better stuff are Crc 5-56 Electronics Cleaner, Blue Stuff, and Tun-o-Wash. In earlier days these products were mostly used for cleaning contact points on tv tuners, etc., but, with digital tuning coming in and rotary analog tuners obsolete these spray cleaners are not sold in as many different name brands or produced in the quantities as they were in the "old days". But, to answer your question, D. Neb., no you don't need to remove a shutter from the camera, etc., to clean it. I just put a couple of paper towels or a good absorbent rag behind the shutter (usually after removing at least the front lens from it) and "hose" it.