Things You'll Need
Proprietary wood cleaner
Wax and wax remover (optional)
Denatured alcohol and paint remover (optional)
Paint scraper (optional)
Wipe the floorboards one at a time, using an old cloth dipped in soapy water. Wipe off the excess water and dirt with a dry cloth as you go along, making sure no water gets into the gaps between the floorboards. If the dirt is stubborn, rub with a soft-bristled brush, then wipe off with a soft cloth. Use water sparingly to minimize damage.
Test to see if your floor has a wax finish. Water creates a white spot on wax, but will soak into bare wood or form bubbles on the surface if the finish is oil. Denatured alcohol makes shellac dissolve; paintremover makes polyurethane and paint bubble; lacquer thinner, nail-polish remover or paint remover make varnish crackle. If the floor has layers of wax, it can look dirty and dull and you may need to remove the wax and then re-wax.
Remove any scuff marks or black heel marks with a cloth dampened with mineral spirits or a proprietary wood cleaner. Rub the affected area and wipe with a clean dry cloth. Be careful when using any solvent on bare boards as some solvents can darken the wood.
Remove grease by freezing it first with a pack of ice or frozen vegetables and then scraping off with a paint scraper or knife. Be careful not to scratch the floor. This method also works for tar. To remove crayon marks, rub with mineral spirits, or try rubbing with a little toothpaste, then wipe clean with a soft cloth.
Remove layers of old wax (if the finish is wax and it is looking yellow and grimy) with a proprietary wax remover. Follow the manufacturer’s instructions.
Clean the whole floor with a proprietary wood cleaner. The wood needs nourishing after being cleaned with water, soap and solvents. If you removed old wax, re-wax your floor by applying wax with a rag or brush, then buffing with a soft cloth or buffing machine. Follow manufacturer’s instructions for application and drying times.
Read more: http://www.ehow.com/how_5130806_clean-dirty-hardwood-floors.html#ixzz2gYNcOURW