Mint sweeps and mops hard surface floors automatically, using popular dry and pre-moistened disposable cleaning cloths or re-usable microfiber cleaning cloths (included). Dry sweeping mode is ideal for picking up dust, dirt and hair. And Mint's special mopping motion gets deeper dirt and grime off your floors. Guided by the North Star Navigation System, Mint tracks where it cleans so it doesn't miss a spot. Mint starts by cleaning open areas, moving methodically back and forth across the floor. Mint detects and cleans around furniture and other obstacles as it encounters them. Mint then follows with a perimeter sweep along the edges of furniture and baseboards, then returns to where it started and parks itself. Smart sensors help Mint avoid area rugs and raised carpet transitions, detect areas that are too low to enter and avoid falling down stairs.