Narwal Robot Vacuum and Mop Narwal is a relative newcomer in the robot vacuum market. It's a sweeper/mopping hybrid that is pretty impressive. However, it's expensive and is hampered by a clunky app with a steep curve. To mop, you drop a detergent sheet into the base station's water tank https://cleaning-robot-mop-and-va81692.blog-kids.com/27880128/what-is-eufy-robot-vacuum-history-of-eufy-robot-vacuum-in-10-milestones