Hi guys, on sunday i was helping out with the Street Festive photo shoots.. After i put on some wide angle lens some kids came over and touch the lenses. Wah so frustrated ;( ;( I saw their prints on the lens.. so i decided to take it off and go home and clean.. But after cleaning, some traces of the prints are still on the lens.. Do anyone know how to remove the prints? i've used liquid cleaners from the cleaning kits, used lint free paper, but still some traces of the "oil" is still there.. HELP MEEEEEEE :angry: