Blot up any fresh urine with paper towels or a clean cloth
Mix equal parts white vinegar and water
Lightly spray or dab the solution onto the affected area
Blot again with a clean cloth
Sprinkle baking soda over the area
Let it sit for several hours or overnight
Vacuum the baking soda thoroughly
Use an enzyme cleaner made for pet urine if the smell remains
Follow the product instructions exactly
Repeat the process if needed
Let the couch air dry completely
Open windows or use a fan to help remove lingering odor
Remove and wash any cushion covers if they are removable and machine washable
Test any cleaning solution on a hidden spot first
Avoid using steam or heat until the odor is gone