Narwal Robot Vacuum and Mop Narwal is a relative newcomer to the robot vacuum market. It offers a sweeping/mopping hybrid that's quite impressive. However, it's expensive and hobbled by a clunky app with a steep curve. Drop a sheet of soap into the clean water tank at the base station https://vacuum-mop-cleaner-robot72766.ttblogs.com/7207558/what-experts-from-the-field-want-you-to-learn