To clean a fabric couch, start by vacuuming the surface to remove loose dirt and debris. Check the care label for specific cleaning instructions. For general cleaning, create a mixture of mild dish soap and water. Test it on an inconspicuous area before applying it to the entire couch. Gently scrub the fabric using a soft cloth or sponge, then rinse with a clean damp cloth. Allow the couch to air dry, avoiding direct sunlight. For stubborn stains, consider using a commercial fabric cleaner or consulting professionals for more delicate fabrics.