Using this soap dispenser is easy. Just load it with your preferred hand soap, detergent, or lotion. Insert four AA batteries into the unit to power the hands - free sensor. When you place your hand under the dispenser, it will automatically dispense soap in a preset amount. To change the soap, use the key to unlock the unit and refill the translucent tank. As for maintenance, keep an eye on the LED light. When it flashes, it's time to change the batteries or have the unit serviced. Wipe the dispenser regularly with a soft cloth to keep its satin finish looking good. Avoid using abrasive cleaners as they may damage the stainless - steel surface.