Narwal Robot Vacuum and Mop Narwal is a relative newcomer to the robot vacuum market. It's a sweeper/mopping hybrid that's pretty impressive. It's expensive and hindered by a clunky, steeply learning curve application. To mop, drop a sheet of detergent into the base station's water tank that is clean. Then https://robot-vacuum-cleaner-blac60074.digitollblog.com/27498439/a-how-to-guide-for-best-rated-robot-vacuum-from-beginning-to-end