Will a Robot Vacuum Scratch Hardwood Floors?
A robot vacuum by itself is unlikely to scratch a finished hardwood floor. Robots are light and run on rubber wheels. When scratches do show up, the cause is almost always grit, or a worn part dragging something hard across the boards.
Where scratches really come from
- Grit in the wheels. Sand and small stones get pressed into the wheel treads. Every time the robot turns, it grinds them across the floor.
- A worn or bent side brush. As bristles wear, the hard base of the brush can touch the floor.
- Debris caught in the main brush. A small stone, screw or bit of hardware stuck in the brush roll can scrape as it spins.
- A full bin. When the bin is full, the robot pushes dirt around instead of picking it up.
- A dirty mop pad. On robot mops, grit trapped in a pad gets dragged across the floor like sandpaper.
A five-minute monthly routine
- Turn the robot over on a soft surface, like a towel.
- Check the wheels. Wipe the treads and pick out anything stuck in them.
- Check the side brush. If the bristles are bent or splayed, replace it. Side brushes are cheap and wear out first.
- Pull out the main brush. Remove hair and anything hard caught in it.
- Empty and wipe the bin, and clean the filter.
- Rinse the mop pad if your robot has one, or check that the station's mop washing is working.
Keep the floor ready for it
- Pick up small hard objects before a run: screws, toy pieces, pet kibble, Lego.
- Use a doormat at each entrance to stop grit getting in from outside.
- Run the robot often. Daily runs catch grit before it builds up and gets walked into the finish.
What to look for in a robot
On hardwood, look for a robot with a scratch-resistant top and good sensors, so it bumps furniture gently rather than hard. The eufy 11S MAX has an anti-scratch tempered glass top and drop sensors. Robots that mop should keep their pad clean while they work. For five models compared for wood floors, see our hardwood floor robot vacuum comparison.
If you already have scratches
Light surface scuffs on a polyurethane finish often buff out with a hardwood floor cleaner or a touch-up product made for your finish. Deeper scratches that reach the wood need a repair kit or a professional refinish. Fix the cause first, or the scratches will come back.