Narwal Robot Vacuum and Mop Narwal is a relative newcomer to the robotic vacuum market. It's a sweeper/mopping hybrid that's quite impressive. But it's also expensive and hobbled by a clunky app with a steep learning curve. To mop, you drop an ointment sheet into the base station's water tank https://robotsthatvacuumandmop82996.onzeblog.com/27716651/what-are-the-myths-and-facts-behind-eufy-robot-vacuum