Narwal Robot Vacuum and Mop Narwal is an relative newcomer to the robot vacuum market. It offers a sweeping/mopping hybrid that's pretty impressive. It's expensive and hindered by a slow, clunky learning-curve app. Drop a sheet of detergent into the tank of clean water at the base station to clean. https://robot-vacuum-mop91434.iyublog.com/27369152/five-best-rated-robot-vacuum-lessons-learned-from-professionals