I had a waxy marker that I used by mistake and the yellow mark wouldn't come out. A long time quilter suggested mixing a little dishsoap, little water, and a Tblsp of rubbing alcohol. Apply with toothbrush and scrub. Rinse really well and repeat if necessary. It took 3 tries but it all came out. I've also used this "recipe" for stains on my lab coats and it works!