Loads of happiness is within reach. Fresh Wave Laundry Booster removes odors using natural ingredients. No harsh chemicals. No harmful ingredients. Give your laundry detergent a boost and remove difficult, set-in odors. Add 2 to 4 capfuls during the wash or rinse cycle. To remove washer odors, wet a soft cloth with Laundry Booster. Wipe the rubber gasket, the door and any other visible seals.