Too much moisture can damage your hardwood flooring over time, leading to warping, buckling, cupping, or cracking. Warping is caused by excess moisture, either below the floor or standing water found on the surface. Buckling is caused by the wood expanding and contracting, creating uneven surfaces as the floorboards rise. Cupping occurs when water gets trapped between your wood floor and the subfloor beneath it. When cleaning your hardwood floors, we suggest wringing out the mop first and not overdoing it with the cleaning products. If you have stubborn sticky spots, try using a damp cloth and a specially formulated hardwood floor cleaner. Never use harsh chemicals on your hardwood floors.