Once every two weeks: Most people don’t realize how much dirt, dust, fur and oils your furniture absorbs. It can host allergens and other nasty things if left unattended. Regular cleaning can help extend the life of your furniture, which means a surface cleaning every couple of weeks using the upholstery attachment on your vacuum.
Pro tip: You should also plan to have a professional clean the upholstery about once a year, depending on how much you use the piece of furniture. If you develop a stain in between cleanings, put your iron on the “steam” setting and wave it back and forth over the problem spot.