Check the care tag
Vacuum the couch thoroughly
Remove cushions and vacuum seams and crevices
Spot test any cleaner on a hidden area
Blot spills with a clean cloth
Clean fabric with the appropriate upholstery cleaner
Clean leather with a leather-safe cleaner
Use mild soap and water only if the care tag allows it
Scrub gently with a soft brush or cloth
Wipe away residue with a damp cloth
Dry the couch completely
Fluff cushions and replace them
Deodorize with baking soda if needed
Repeat regular vacuuming and spot cleaning