Disclaimer: This information specifically applies to hardwood flooring finished with polyurethane coating. This is NOT appropriate for the older wax-based finishes! While most will rely on commercial floor wax, in time, it actually diminishes the sheen on your floor. It also makes it course and antiquated in time.
1. Clean your floor both by sweeping and wiping. Never use abrasive cleaners such as sharp or rough objects.
2. Apply hardwood floor cleaner on a small section of the floor or directly onto a terry cloth wood floor mop. DO NOT WET WOODEN FLOOR. This may leave puddles of water that can leak down between the boards and cause the finish to expand or lift your wood.
3. Wipe flooring with dry mop, regardless if its solid planks, hardwood floor, synthetic wood or mahogany planks.
What you should avoid
1. Hardwood floor (with polyurethane) should never use wax, oil-based detergents or vinegar. Vinegar will etch the surface because its acidic, therefore avoid all formulas with acidic nature. Waxes and oils leave a sticky residue on the surface of the wood and prevent the polyurethane from shining. When cleaning hardwood floors, you can use any commercially available product.. Vinegar and water or lemon based cleaners, are acidic and will over time pit the polyurethane finish, and ultimately reduce the shine of any wood floor.
2. Never allow any amounts of liquid (water or solution) to puddle on any floor for long periods of time. This will shrink your wood and discolor it.
3. Never use a dirty mop to clean hardwood floors! Any grit caught in the mop will scratch the finish.
4. Never drag heavy furniture across your wood floor without something underneath the feet to prevent scratches and distribute the weight. You can buy furniture protections in any DIY (do it yourself) hardware shop. If you want a homemade device, cutting out used rubber sleepers can do the trick.