Hello, I have a 97 y/o parent that is experiencing this same issue. She constantly feels there is 'grit' or 'ash' covering her body, clothing, and bedding. Showering, washing clothes, etc, does not provide relief. When I examine her, I do not see anything on the surface of her skin. She's experimented with a few of her medications to see if each may be the culprit with zero success. She has also tried applying moisturizer throughout the day, as well as eliminating potential allergens, also without success. Has anyone found any explanation or solution for this condition?