I use club soda on spills like wine or soda (specially dark sodas) and it worked on cat barf so maybe.. pour it on a bit .. let it sit a couple minutes and see what happens. Frustrating as all heck and the mud will come up, if you have to borrow someones home shampoo machine mud comes up. Had two dogs come running in like bafoons once, my x let them in said its my own fault for letting them outside. I had a towel at the door to wipe their feet he didnt wipe and didnt clean it. Machine worked amazingly well. Next time, let the mud DRY first.