Brush off any dirt from areas plated with silver or gold, and do not treat these fragile areas further.
Mix 1 part liquid dishwashing detergent and 5 parts water. Dip a soft cloth in the soapy solution and rub the wooden surface gently to remove grime. Use different areas of the cloth to prevent the dirt from spreading. When finished, blot the wet areas dry using a clean soft cloth.
Wipe off stains that persist using phosphate-free trisodium phosphate (TSP) solution or TSP substitutes and the same technique as when using the soapy solution. The original TSP, which contains phosphates, is not environment friendly and has been banned in some states.
Dip a soft cloth in naphtha or mineral spirits, and use it to wipe off any oily grime or wax buildup. Be careful because naphtha is flammable and has a strong odor.
Place a lump of paste wax in the center of a soft lint-free cloth. Twist the cloth into a ball and work the wax with your hands to soften it. Rub the cloth against the wooden surface, letting the paste wax bleed through. Apply the wax evenly and let it turn hazy. Use a clean piece of soft cloth to remove the excess wax and rub the surface until you get an even polish.