The answer to 'upholstery filthy' is that there are several common causes, including heavy use, pet hair and dander, spills and stains, and general accumulation of dirt and debris. Symptoms include a dingy, discolored appearance, musty odors, and visible stains or matting of the fabric. The solution typically involves a thorough cleaning process to remove built-up grime and restore the upholstery to a fresh, clean condition.
For minor issues, homeowners may be able to tackle the cleaning themselves using specialized upholstery cleaners and a soft-bristle brush or vacuum attachment. However, for heavily soiled or damaged upholstery, it's often best to call in a professional cleaning service. They have the right equipment, cleaning solutions, and expertise to safely and effectively clean and restore the fabric without causing further damage.