I change my dolls once a month into a different theme. I always wash my hands before changing them, although I have noticed some of them are showing "dirty" marks/smudges on the arms. I also purchased a Madra that seems to have permanent black marks from he opera length glove so I only use her with outfits that work with the gloves. I tried soap and water, alcohol, and even magic eraser, but nothing has seemed to work. Does anyone have a suggestion on how to clean them? Thank you in advance