I bought a couple of AES games that had been rentals the carts where in great shape except for one thing...Nasty rental labels..After trying several cleanser that I knew wouldnt harm the plastic that didnt work well at all I used peanut butter it worked great! It even removed those nasty void if removed labels without much effort at all....Just thought I would pass this tip along for anyone struggling to get rid of unwanted labels. Worked great on the games cases too.