Narwal Robot Vacuum and Mop Narwal is a relative newcomer in the robot vacuum market. It offers a sweeping/mopping hybrid that's quite impressive. It's expensive and hampered by a cumbersome, slow learning-curve app. Drop a sheet of detergent into the tank of clean water at the base station to mop. https://cleaningrobotmopandvacuum06102.wssblogs.com/27718366/ten-things-everyone-misunderstands-about-the-word-best-rated-robot-vacuum