Narwal Robot Vacuum and Mop Narwal is a relative newcomer to the robotic vacuum market. It's a sweeping/mopping hybrid that's pretty impressive. However, it's expensive and hobbled by a clunky app with a steep curve. To mop, drop a detergent sheet into the base station's water tank that is clean. https://bestrobotvacuumandmop30054.tusblogos.com/27694421/best-rated-robot-vacuum-101-it-s-the-complete-guide-for-beginners