Wash with dish detergent before first usage. Do not use a scrub brush or polishing powder with this product. Wipe water droplets off the outside and do not add cold water when cooking. If the glass is hot do not touch with a wet cloth or place on a wet surface. Do not heat while empty. Do not drop this product or hit it on other objects. Stop using this product immediately if it becomes damaged. Do not use for purposes other than for which it was designed.