I have used Goop--it's a hand cleaner that gets grease out of clothes too. You just put it on while the clothes are dry, and follow the directions on the container. Probably leave it on for a while to let it do it's thing. It may take a round or two, but will help. It is probably found in the automotive section of Walmart or whatever store you shop at. It works wonders with grease based stains, and is not hard on fabrics. It has worked for me. Good luck!