Narwal Robot Vacuum and Mop Narwal is a relative newcomer in the robotic vacuum market. It's a sweeping/mopping hybrid that's quite impressive. But it's also expensive and hobbled by a clunky app with a steep curve. To mop, you place a detergent sheet into the base station's clean water tank. https://robotsthatvacuumandmop37785.blogacep.com/32842460/a-reference-to-eufy-robot-vacuum-from-start-to-finish