Dairn, use Castrol Superclean degreaser. Be careful to buy the degreaser as they also make a cleaner. The Superclean degreaser works great. Spray it on, let it sit a minute and then wipe it off. For tough spots, spray it on the rag, then rub it in for a little bit. Works better than anything I have seen. Never has it not worked. It's the good stuff!! You can buy it pretty much anywhere, Target, Wal-Mart etc..