Narwal Robot Vacuum and Mop Narwal is a relative newcomer in the robotic vacuum market. It's a sweeper/mopping hybrid that is pretty impressive. However, it's expensive and hampered by a cumbersome app with a steep curve. To mop, you place an ointment sheet into the base station's clean water tank. https://bestratedrobotvacuum67740.blogoscience.com/33709870/a-guide-to-eufy-robot-vacuum-in-2023