Summer stains? Tidy up with this handy guide. Bicycle grease stands no chance: gently absorb grease with paper towel and apply laundry detergent to the back by dabbing. Machine wash. Remove blood stains with club soda or baking soda with a cotton swab, soaking in for 10 min. Then launder. Spot-treat sunscreen stains with Dish Soap and glycerin & wash. Scrub grass stains with laundry detergent and a toothbrush. Wash as usual.