Stone sealant should be applied once a year to protect the grout and natural stone from the elements. If stone and grout become soiled, use a mild detergent with water and a soft cloth or brush to gently clean. Do not use abrasive cleaning products. Avoid products containing ammonia, bleach, or other hazardous/polluting compounds. Always test in a small inconspicuous area when using a new cleaner to ensure compatibility.