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 expensive and hampered by a cumbersome, slow learning curve application. To mop, you place a detergent sheet into the base station's water tank that is clean. https://robotvacuum36952.blogdanica.com/27605128/why-is-this-best-rated-robot-vacuum-so-beneficial-in-covid-19