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 hampered by a cumbersome app with a steep learning curve. To mop, you place a sheet of detergent into the base station's water tank https://vacuum-mop-robot-cleaner45106.full-design.com/how-to-tell-if-you-re-ready-to-go-after-eufy-robot-vacuum-70564537