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. It's costly and is hindered by a cumbersome, slow learning-curve app. To mop, you place a detergent sheet into the base station's water tank that is clean. https://automaticvacuumandmoprobo74146.kylieblog.com/28145120/7-essential-tips-for-making-the-the-most-of-your-best-rated-robot-vacuum