Disinfection Clean surface with soap and warm clean water. Rinse with clean water. Pour 1 cup (250 mL) of BestChem Bleach to 10 Litres of water. Bleach solutions require a full 10 minutes of contact time to ensure complete disinfection. If bleach solution evaporates in less than 10 minutes, a greater volume of solution should be applied. After disinfection, surfaces should be rinsed and dried. Warning! Corrosive! It may cause irritation to areas of contact. Always test the product in inconspicuous area before using. Do not use on metal parts.