The best way to clean a hardwood floor is to mop the floor with Vinegar and water.
Vinegar and water is a natural chemical free way of cleaning hardwood floors.
Pour a cup of vinegar into a gallon of water and then mop your hardwood floors as normal.
Just be sure to not leave any water on the floor and be sure to thoroughly dry the hardwood floors after mopping them.
If you leave water on the hardwood floor the hardwood floor may crack or split and even warp damaging the hardwood floors.