Home Tech: Man’s New Best Friend

With robot vacuums, there's the bump-and-grind approach and then there's this one's: It tracks an infrared beam on the ceiling to triangulate it's location in your space and then sweeps or mops the floor in neat rows—corners and all (thus the shape).

Mint Plus Automatic Floor Cleaner, by Evolution Robotics; from $299; mintcleaner.com
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