To Remove Stains and Boost Colors: For standard washing machines, add product to the wash basin along with your favorite detergent. Fill the cap to the first fill line for small or regular loads and to the second fill line for large or extra-large loads. For HE washing machines, fill to the first fill line and add product with your favorite detergent in the detergent dispenser. For best results, start the washer and add both detergent and product before adding clothes. For extra-dirty clothes, pre-soak the garments before starting in mixture of 1 cap-full of product (to the first line) and 2 gallons of water (the warmest water recommended on the care label). Pre-soak for 30 minutes.