The answer to 'upholstery grimy' is that grimy, dirty upholstery is a common problem for many homeowners. This can be caused by a variety of factors, including heavy use, pet hair and dander, spills and stains, and general dust and dirt buildup over time. Symptoms of grimy upholstery include a dull, discolored appearance, a rough or sticky texture, and an unpleasant odor.
For minor issues, you may be able to tackle the problem yourself with some basic cleaning techniques. Vacuum the upholstery regularly to remove surface dirt and debris. Spot clean stains as soon as possible using a mild detergent or upholstery cleaner. For deeper cleaning, you can use a steam cleaner or rent a professional-grade upholstery cleaning machine. However, for heavily soiled or damaged upholstery, it's best to call in a professional cleaning service to ensure the job is done properly and safely.