Excuse for posting the Nikon forum but photo.net only provides a lot of B&W imaging forums. ANYWAYS..... My wife loves to put photos on our refrigerater held up by magnets. Over time some of our most cherished photographs (have lost the negetives and not on digital files) are now coated with a very thin layer of airborne kitchen grease that have built up over years. The questions are: How do I clean these prints? Float them in a hot water bath for some time? Add some grease dissolving dish soap? I guess I could scan them but I feel I would lose some of the original luster/glossy finish and true print color.