Is your dryer's tumbler stained? A stray crayon, forgotten pen, or excess dye from clothing not only stains clothes, but your dryer, as well.  To remove stains on your dryer's tumbler, apply spray cleaner, a mild abrasive, or laundry stain treatment to the affected area of the dryer tumbler  and wipe with a damp cloth. Then dry a load of old towels or rags for about 25 minutes. These steps will remove the stain on your dryer's tumbler. Even if a mark remains on the dryer tumbler, the color won't transfer onto your clean laundry.