Try using a pencil eraser and see if it will come out. I've used this trick on both of my pairs of MMM sneakers, and it worked well. Don't expect miracles, and you'll be in good shape. I have a couple pairs of heavily soiled suede shoes, and I'm going to try the eraser to see if I can get some life back into them (I had a pair of Alife Everybody mids in bright red suede, and that same night they got fucked up.

) Good luck!