Using this dispenser is easy. Just insert 25 cents and select your desired product from the appropriate slot. When restocking, open the door using the key for the tumbler locks. Place the tampons or sanitary napkins in the correct slots according to their sizes. As for maintenance, wipe the dispenser regularly with a soft cloth to keep the No. 4 satin finish looking good. Avoid using abrasive cleaners as they can damage the stainless - steel surfaces. Also, check the locks and hinge periodically to make sure they're working properly. If you notice any issues, contact the manufacturer for support.