For water hardness up to 250 ppm add 16 ml per liter of water (1:64) to disinfect hard non-porous surfaces. Treated surfaces must remain wet for 10 minutes. For heavy-duty use add 64 ml per liter of water (1:16), to disinfectant hard non-porous surfaces. Apply at 16 ml per liter of water to hard inanimate, non-porous surfaces thoroughly wetting surfaces as recommended and required, with a cloth, mop, sponge, or sprayer. For heavily soiled areas, a preliminary cleaning is required. For sprayer applications, use a coarse spray device. Spray 15 - 20 cm from surface. Rub with brush, sponge, or cloth. Do not breathe spray. Treated surfaces must remain wet for 10 minutes. Prepare a fresh solution at least daily or when use solution becomes diluted or soiled. Rinse all surfaces which come in contact with food such as countertops, appliances, tables and stovetops with potable water before reuse. This product is not for use to disinfect or clean eating utensils, glassware, and dishes.