Part of the beauty of wood floors is that they change over time, taking on character and patina. You might even appreciate the squeaks and creaks that sometimes develop?as long as they?re not too loud. But you still need to manage the aging process of your floors. Severely worn wood floors don?t look good, and when you sell your home, prospective buyers won?t see the ?character? of the floors so much as several thousand dollars they?ll have to spend having the surfaces refinished or replaced. Here?s how to keep your wood floors looking their best. Daily Duty Sweeping is essential to maintaining the integrity of the finish. Regularly sweep wood floors with a soft-bristle broom. If the floorboards have beveled edges that trap dirt and crumbs, use the bare-floor option on your vacuum instead of a broom. (In our tests, canister vacuums perform better than upright vacuums on wood floors. The trade-off is they can be heavier and pricier than uprights. For more advice on choosing a vacuum, read our latest report and use our expert shopping advice.) Occasional Tasks Clean your floors periodically with a wood-cleaning solution. (If you sweep or vacuum diligently, cleaning a few times a year might suffice.) Which cleaner you use will depend on the type of finish you have. To test, apply a few drops of water in an inconspicuous area, says inside a closet. If white spots appear within 10 minutes, the finish is wax. If no white spots show up, it's polyurethane. Another way to identify a polyurethane finish is to scratch the surface (again, in an out-of-the-way area) with a coin or other sharp object. If the finish does not flake, it?s polyurethane. Clean floors with a polyurethane finish with a solution of 1 cup distilled white vinegar and 3 to 4 gallons of warm water. (Or use a waterborne cleaner designed specifically for urethane finishes, such as Bona.) Damp-mop the floor damp?don?t soak it: Dip a terry-cloth towel into the solution, wringing the towel of excess solution and covering a standard flathead mop with the towel to clean the floor. Clean wax-finish floors with a solvent-based cleaner and liquid wax designed specifically for wood floors. Regardless of the finish, never use products intended for vinyl or tile on wood floors, as they can dull the finish and make the floors slippery. Be careful when using a sponge mop; some have hard metal edges that can easily scratch floors. Preventive Measures ? Place a doormat outside entrances to your home to keep people from tracking dirt and grit indoors. ? Better yet, instate a no-shoes policy, which will preserve the floors. If you can?t ban all footwear indoors, at least ask people to remove high-heel shoes; they can have an impact of 2,000 pounds per square inch, enough to mottle the surface of a wood floor over time. ? Use plastic or felt protectors under furniture legs to prevent scratches. When rearranging furniture, always lift pieces instead of sliding them. ? If you have a wood floor in the kitchen, place a mat in front of the sink and range to prevent steady foot traffic from wearing bare spots into the finish. Essential information: When you need to install new floors, read our latest report on solid-wood, engineered-wood, and plastic-laminate options.