Narwal Robot Vacuum and Mop Narwal is an relative newcomer to the robot vacuum market. It offers a sweeping/mopping hybrid that's quite impressive. But it's also expensive and is hampered by a clunky app with a steep learning curve. Drop a sheet of soap into the tank for clean water https://vacuummoprobotcleaner18240.dm-blog.com/27756912/10-unexpected-best-rated-robot-vacuum-tips