The first step in keeping your hardwood floors in top shape is to keep grit off them. Use dirt-trapping, walk-off mats at all exterior doors to help prevent dirt, grit and sand from getting inside the building. Throw rugs or small sections of carpet just inside the entrances are also recommended. Dirt and grit are any flooring's worst enemy, and that includes carpets and vinyls as well as hardwoods. Keep door mats clean. In kitchens, use area rugs at high spill locations and at work stations-stove, sink, refrigerator. Cotton is generally the best fabric since it is easily washed. Mats with a smooth backing, i.e. rubber or vinyl, may trap water beneath.