The best way to clean your sofa or couch will depend on the material. Leather sofas can be cleaned with a mild soap and water solution. Fabric sofas can be cleaned with a vacuum cleaner and a brush attachment. You may also need to use a steam cleaner or spot cleaner to remove stains.
You should clean your sofa or couch at least once a week. If you have pets or children, you may need to clean it more often.