The answer to 'how to clean floor' is to use the right cleaning products and techniques for the type of flooring you have. For hardwood floors, use a wood floor cleaner and damp mop. For tile or vinyl, use a pH-neutral floor cleaner and a string mop. Avoid using too much water, which can damage floors. Regularly sweep, vacuum, or dust mop to pick up dirt and debris before mopping.
If you have stubborn stains or your floors need a deeper clean, it's best to call a professional cleaning service. They have the right equipment and expertise to clean floors safely and effectively without causing damage.