They require cleaners that won't leave a film or residue. Manufacturers of "Pre-finished" hardwood floors recommend their own specific products designed for their floor's routine maintenance.
Do not use ammonia cleaners or oil soaps on a wood floor, as they will dull the finish and performance of your floor. Since wood naturally expands when it is wet, never wet mop or use excessive water to clean your floor
. Large amounts of water can cause the wood to swell and may cause your floor to crack or splinter. Being a natural product, hardwood will expand and contract due to moisture level changes. Minimize water exposure to hardwood floors and clean up spills as soon as they happen.