Narwal Robotic Cleaner review: This self-cleaning robot mop/vacuum combo frees you from dirty work

Periodic wet mopping is the best way to keep hard floors clean, but many of us don’t make the recommended once-weekly effort. If the required physical labor isn’t enough of a deterrent, there’s all that dirty water to deal with afterward. The Kickstarter-funded Narwal Robotic Cleaner aims to solve both those problems. Equipped with smart sensors and