Using this soap dispenser is easy. First, choose your preferred power supply, either the battery pack or the A/C adapter. Then, fill the 70.5oz soap tank from the top with any non - proprietary bulk foam soap. When you place your hands under the dispenser, the touch - free dual sensors will activate and dispense soap. Keep an eye on the indicator light at the base of the spout. It shows power status, activation, and when the soap is running low. As for maintenance, since it has a vandal - resistant construction, it's quite durable. But make sure to clean the dispenser regularly with a soft cloth. Also, replace the batteries if you're using the battery pack, or check the A/C adapter for any issues. And remember, this is a non - returnable item.