Clean with a soft dampened cloth only with water and thoroughly dry. Avoid chemicals that can damage the protective coating (ammonia, acetone, trichloroethylene, etc), acids and metal cloths. Clean always following the grains, paying attention to not polish cause you will damage the uniform brightness of the surface.
For the cleaning, use a soft cloth with a glass detergent and thoroughly dry. Do not use pastes or abrasives powders, metal cloth, acid-based detergents or other detergents containing wax or silicone that might form rings.