Just recently our Kenmore elec. dryer started leaving stains on our clothing. The stains look like the little guy that lives in the dryer and steals socks takes a grease pencil and makes little marks that are from a half inch to 3 inches long. There is usually only one mark on each garment and they are in various locations. We have checked the drum and see nothing obvious that could be causing it. There is kind of a seal thing between the drum and the back of the dryer that looks stained, but I've cleaned it as good as I can and the stains continue. Any ideas, and if you do, is it a diy job?