Tried out my new Dry Me Crazy towel today. This thing does soak up water great. Only bad thing is there was a spot near the muffler where I accidentally touched with the towel. Now I have a small stain on my great new towel. Is there anything I can do to remove the stain and not mess up towel? I've already tried washing it, took very little off but still there. Can I use some liquid Oxyclean with towel? I know no bleach.