Using this dispenser is easy. First, mount it on the wall as it's designed for wall mounting. Then, load a Pacific Blue Ultra refill into the dispenser. When you place your hand under the dispenser, it'll automatically dispense liquid soap or sanitizer. Make sure to only use Pacific Blue Ultra refills as other types won't work with this dispenser. As for maintenance, since it has long - lasting batteries, you don't need to change them often. But when the batteries run out, replace them promptly. Also, check the refill level regularly. If it's low, replace the refill bottle. The fresh nozzle on each refill helps keep things clean, but it's still a good idea to wipe down the dispenser occasionally to keep it looking nice and functioning well.