Sorry, man. I think it's a lost cause. I've had my house cat urinate on my couch and there is literally no product on earth that will fully eliminate the odor. I've tried every creative house remedy and pet odor cleaner (Simple Solution, Out!, and some various Veterinary office cleaners) to no avail. The biggest challenge is that the cat urine penetrates the fibers in the cushioning. You'll no doubt have to soak it, and that may help reduce the odor for the most part, but I don't think you'll ever be rid of it. Whatever you do, if you have any interest in salvaging the couch, use only enzymatic cleaners. Your traditional household stain removers (Resolve, Spot Shot, etc.) will only intensify the odor. Nature's Miracle and Simple Solution are your best options from my experience, but buy a gallon. You'll probably need it...