I have tried both wd-40 and goo gone mentioned above. The best (and I am assuming that faster is better) solvent I have found is goof-off. You can get it in any hardware store and it is strong enough to eat the skin off you hand. It works really well but make sutre to wash it off after your dine becuase it will start to eat the paint if you leave it on too long. The safest way (and the logest) is something like simple green as this like wd-40 goo-gone and goof-off will eat the paint.