Instructions and Use Laundry machine Just add 1 tablespoon of sodium percarbonate to washing machine. For tougher stains, add 2 tablespoons. Next, run wash cycle as usual, adding your laundry detergent. Presoak (Great for whitening!) Add 2 tablespoons per gallon of warm water. Let soak 6 hours, then wash. Spot treatment Mix with enough warm water to make a paste. Let sit 15 minutes. Apply to stain and rub, then wash. Decking/Wood Bleach Remove furniture and decor and preclean of debris and dirt. Mix 1/2 to 1 cup of powder per gallon of hot water in a hand pump sprayer. Saturate the deck with the solution and allow it to soak in for up to 30 minutes; respray as necessary to keep the deck wet. Scrub with a stiff deck brush or broom to loosen and remove stains. Rinse with a garden hose and allow it to air-dry. Note: Sodium percarbonate will fizz when added to water. Always use a large enough container so it will not overflow when mixing. Always use appropriate PPE!