Had 2 UK records over the years that looked absolutely perfect, when played it was like 'frying tonight dear'...I could not understand what the hell was wrong with them, nice and clean, no marks but they just would not play without loads of crackle. I tried everything to clean them up and nothing worked. Took them to a guy in a shop in Norwich who's records always seemed very clean and bright.....he cleaned them up no problem using a combination of Tesco's unscented baby wipes and Mr.Muscle window and glass cleaner, after a few cleans using both, and some elbow grease, they played perfect!!