The answer to 'why is my upholstery discolored' is that there are several common causes, including sun exposure, spills and stains, and general wear and tear. Discoloration can range from fading and lightening to more severe staining and discoloration.
Sun exposure is a leading cause of upholstery discoloration, as UV rays can break down the dyes and materials over time. Spills and stains that are not properly cleaned can also lead to permanent discoloration. Additionally, regular use and wear can cause upholstery to become discolored and worn over time.