Find someone who is a Melaleuca rep and order some Sol-U-Mel. The stuff takes anything off. Last week my daughter found red permanent marker and colored both of her arms the night before Mother's Day. Since S.U.M. is all natural and safe for skin, it was perfect. It came off no problem! You can use the stuff to clean stains anywhere, plus it has a million other uses.
Seriously, Sol-U-Mel is awesome. I don't order Melaleuca anymore because of the minimum amount of products that I was required to buy each month, but I am going to get some soon from my cousin because it really is great!