Narwal Robot Vacuum and Mop Narwal is a relative newcomer to the robot vacuum market. It's a sweeper/mopping hybrid that's quite impressive. It's also costly and hampered by a cumbersome application with a steep learning curve. To mop, you drop an ointment sheet into the base station's clean water tank. https://robotvacuumthatvacuumsand37270.blogolize.com/eufy-robot-vacuum-tips-from-the-most-effective-in-the-industry-67216179