Narwal Robot Vacuum and Mop A relative newcomer to the robotic vacuum market, Narwal offers a sweeping and mopping hybrid that's pretty impressive. It's costly and is hindered by a clunky, steeply learning-curve app. To mop, drop a sheet of detergent into the base station's water tank that is clean. https://bestrobotvacuumandmop64313.humor-blog.com/27207718/what-is-best-rated-robot-vacuum-and-how-to-use-it