Urine odor-remover without fragrance?

My oldest cat has been losing control of his bladder.  I've been cleaning with vinegar but I'd like to buy a product to treat my couch, as the urine soaked deeply into it.  I have tried Fizzion but it has a fragrance, something I avoid for both myself and my asthmatic cat, and I know Nature's Miracle also has a fragrance.  Any suggestions?  I'm not concerned about my other cats peeing where he has gone, for the record, I just want to eliminate what I can smell.

I never noticed that Natures Miracle has a fragrance. 

I also have asthma and I use the regular Natures Miracle; not the scented kind. It does have a bit of a smell, but after it dries, the smell goes away. 

This is the only thing I know of that really takes out the "yuckies"....

Perhaps You could try a strong solution of Oxi-clean mixed with water. I would try an inconspicuous area first, to test it out.

You might try this product. It doesn't do all the wonderful things the salesman promised, but it does eliminate cat pee odor well (not one of the things promised). Be sure you get the clear/unscented one. The company makes it with a number of different scents.

I made an impulse purchase of Nature's Miracle Just for Cats. It looked the same as the regular Nature's miracle("natural orange scent") and was slightly less expensive. I have yet to use it but I'll post the results when I do. Thanks.

I've been using Nature's Miracle Just for Cats for a couple of years. I'm on the hunt now for an unscented or "other scented" product because I can't tolerate the fragrance of Nature's Miracle anymore. Maybe because I associate the scent with the smell of cat pee now? Anyway, this product DOES have a scent, buy it does fade after the product dries.