CarGuyZM10

Hi everyone. Today our convertible came back from the upholstery shop with a new white convertible top. It's the original material, with the proper plastic window. I've been told that the best way to clean the top is to not get it dirty (though he said dawn soap or car wash for the top). He said the same for the window, but said that we can only use a dust mop on it, or it will get scratched. Well, Grandpa and Dad picked it up with the guy's finger prints on it, and they are driving me crazy! What can I do to clean the finger prints and smudges off of it without causing scratching on the plastic? Thanks.