The answer to 'tough stains on upholstery' is that there are several common causes, including spills, pet accidents, and ground-in dirt. Symptoms include visible stains, discoloration, and odors. The best solution depends on the type of stain and the upholstery material.
For DIY cleaning, start by blotting the stain with a clean, absorbent cloth. You can also try a mild soap and water solution or a specialized upholstery cleaner. Test any cleaning product in an inconspicuous area first to ensure it doesn't damage the fabric. If the stain persists or you're unsure about the best approach, it's best to call in a professional upholstery cleaning service. They have the right tools and expertise to safely remove even the toughest stains without damaging your furniture.