I've been succesful with Simple Green, in the cleaning section or the automotive section. Get the plain one not the one for special purposes (stainless cleaning,etc). I would apply it to the spot,use a soft brush to try to imbed it in fabric. Let it sit overnight, occasionaly making sure it is still saturated. Rub with brush again before washing & wash. As a kindergarten teacher, I got out everything from permenant marker, dried PlayDoh,papier mache,pumpkin insides, etc. However, It is better to not put ANYTHING on the spot until you get home-not even water. Good luck!