Using this combination unit is easy. Just place your roll paper towels inside the dispenser. When you need a towel, wave your hand in front of the sensor, and it will dispense a towel for you. For the waste receptacle, simply open the door and throw your trash inside. When it's full, empty it. As for maintenance, regularly clean the stainless - steel surfaces with a mild cleaner to keep the satin finish looking great. Check the tumbler lock on the door occasionally to make sure it's working properly. Also, when installing, make sure to follow the ADA standards and local codes to ensure proper functionality and compliance.