The answer to 'upholstery discolored' is that there are several common causes, including sun exposure, spills, and improper cleaning. Discoloration can range from fading to staining and can be difficult to remove. In many cases, you can try DIY cleaning methods, but for severe or set-in discoloration, it's best to call in a professional upholstery cleaning service.
Some common causes of upholstery discoloration include direct sunlight, which can fade fabrics over time; spills or stains that set in if not cleaned promptly; and improper cleaning techniques that can cause water rings or other damage. The symptoms can vary from subtle fading to distinct stains or discolored patches.