Super Clean Plastic Cleaner. Design to remove contaminants from the surface of plastic before painting but this thing also INSTANTLY removes & cleans all kinds glue, grease, oil, dirt stain spots...etc. It comes in a spray can so it is very convenient for repeated uses and storage. I am not advertizing for them, I just wanted to share a great product.
(http://i1229.photobucket.com/albums/ee478/superduc/Super-Clean-aerosol-12.jpg)