The answer to 'upholstery cleaning buildup' is that it is a common problem caused by a buildup of dirt, dust, and oils over time. Symptoms include a dull, discolored appearance and a rough, sticky texture to the fabric. The solution is to have the upholstery professionally cleaned on a regular basis, typically every 12-18 months.
While some DIY spot cleaning can help, it's best to have the entire piece of furniture thoroughly cleaned by a professional upholstery cleaning service. They have the right equipment and cleaning solutions to safely and effectively remove the built-up grime without damaging the fabric.