Using this soap dispenser is easy. First, fill the 50.7 oz. container through the top - fill opening with your favorite foam soap. Plug it into an AC power source. Every time you place your hand under the sensor, it will dispense a nice amount of foam soap. For maintenance, clean the exterior regularly with a soft, damp cloth. Don't use abrasive cleaners as they may scratch the bright stainless surface. Also, make sure to keep the sensor area clean to ensure proper operation. When refilling, avoid over - filling the container to prevent spills.