Using the Milwaukee M12 AirSnake Drain Cleaner is quite simple. First, make sure the REDLITHIUM battery is fully charged. Then, select the appropriate attachment for the type of drain you're working on, like a sink, toilet, or floor drain. Attach it to the M12 AIRSNAKE. Place the drain plug in the drain and set the variable pressure dial according to the type of pipe system. You can start the machine, and the powered air will do the job of clearing the clog. Remember to keep your hands and other objects away from the drain opening during operation. As for maintenance, after each use, clean the attachments with water to remove any grease or sludge. Store the machine in the provided case in a dry place. If you notice any issues with the battery or the machine's performance, contact Milwaukee's customer service.