The answer to 'how to maintain upholstery' is to regularly vacuum and spot clean the fabric, use the right cleaning products, and protect it from direct sunlight and heavy wear. Proper upholstery maintenance will help extend the life of your furniture and keep it looking its best.
Start by vacuuming upholstery weekly using the upholstery attachment to remove dirt and debris. Spot clean spills and stains immediately using a mild soap and water solution or an upholstery-specific cleaner. Avoid rubbing too hard, as this can damage the fabric. Once or twice a year, consider having your upholstery professionally cleaned to deep clean and sanitize it.