The fastest way to achieve the whitening effect is via soaking: Soaking: 1. Add one scoop to 7L of warm water (max. 40 degrees) and leave garment to soak for a maximum of 6 hours. 2. Rub the fabric to remove stains. 3. After soaking, wash as usual. Alternatively… Washing Machine: 1. Add 1 scoop with your laundry detergent in the washing machine drawer. 2. Wash as usual.