Even though they're called "no-wax floors," time and heavy use can wreak havoc with their appearance. When the glossy layer of a no-wax floor gets worn or dull, you may want to add a floor finish or wax to maintain the shiny appearance of the floor. It's best to keep no-wax floors vacuumed or swept on a regular basis to maintain the finish. However, once it's time to protect it, you can choose a floor polish sold at grocery or discount stores, or you may want to use a self-polishing, metal-interlock floor finish that can be purchased at a janitorial supply store. Traffic areas often need to have finish applied to them more often than the rest of the floor. For regular maintenance, sweep and damp-mop the floor with plain water or water with a couple drops of liquid dish soap. Regular sweeping and mopping will keep soil from wearing away the surface. If the floor has some tough spots to clean, you can use a white, nylon-backed scrub sponge on it. It's a good idea to keep doormats at all the entrances to your home, as they will catch much of the dirt that could eventually damage your floors.