Fortunately, Dawn is a very gentle cleaner. You can use it on hardwood floors without ruining the surface. You can mix a DIY cleaner using Dawn dish soap! Mix two to three tablespoons of Dawn in a gallon of warm water, then mix well. Use it to wet mop your floor, and the grime will come off. Remember to go over the surface with a clean, dry mop afterwards to soak up all the moisture. Moisture is bad for hardwood.