First, this is a residential hardwood floor cleaner. It is not meant to refinish a floor or power scrub. It would ruin the hardwood. It is not meant for commercial use. You have to go slow both forward and backward to get the best result. It worked great on our floors that had been neglected for quite a while. We have dogs and lots of dirt that gets dragged into the house. Some spots were a little more challenging. Overall, a great power wet mop for hardwood floors.