The answer to 'tough stains on hardwood floor' is to first identify the cause of the stain and then use the appropriate cleaning method. Common causes of tough stains on hardwood floors include spills, pet accidents, and ground-in dirt. Symptoms may include discoloration, sticky or oily residue, and difficulty removing the stain with regular cleaning.
For DIY cleaning, start by blotting up any excess liquid with a clean, absorbent cloth. Then, try a small amount of mild soap and water, or a specialized hardwood floor cleaner. Avoid using harsh chemicals or abrasives, as these can damage the floor's finish. If the stain persists, you may need to sand and refinish the affected area. For more stubborn stains or extensive damage, it's best to call in a professional hardwood floor cleaning and restoration service.