The double size bed mattresses are mostly clean. It's the 2 seating cushions that got mostly hit. The 1994 Flagstaff roof had leaks (which I am rebuilding now) and one canvas window tear probably let some rain in. I don't know if the grey stains you see in the photo are mold or just dirt? The roof had some mold due to the leaks. You can see the cleaner bed mattress behind the stained seat cushion matttress below. What options to clean do I have?