Using this soap dispenser is easy. First, choose your power supply, either the battery pack (4xAA alkaline) or the A/C Adapter. Then, open the top-fill area and pour in your liquid soap with a viscosity between 100 cps - 5000 cps into the 70.5oz tank. When you need soap, just place your hand under the dispenser, and the touch-free dual sensors will activate. The indicator light at the base of the spout will tell you if it has power, when it's activated, and when the soap is running low. As for maintenance, keep it clean with a soft cloth. Avoid using harsh chemicals as they might damage the Brushed Nickel PVD finish. Also, make sure to replace the batteries regularly if you're using the battery pack. And remember, this is a non-returnable item, so handle it with care.