The answer to 'how often to clean upholstery' is that most experts recommend cleaning upholstered furniture every 6-12 months, depending on usage and wear. Regular vacuuming and spot cleaning can help extend the time between deep cleanings, but over time, dirt, dust, and oils from skin and hair can build up in the fabric, requiring a more thorough cleaning.
For high-traffic areas like living rooms or family rooms, a professional upholstery cleaning every 6-9 months is ideal to keep furniture looking its best. In less-used spaces like formal living rooms or guest bedrooms, you may be able to stretch the time between cleanings to 12 months or more. It's also a good idea to clean upholstery after major events like parties or when you notice visible dirt or stains.