Just because you cleaned the urine spot does not mean your troubles are over.
Unless this was completely a one-time incident, it is likely that this will happen again.
You must figure out what has caused your cat pee on the couch in the first place.
If you want to safely neutralize cat urine smell, we recommend:
Is the litter box very clean?
Scrub out the litter box once a month
Scooping used litter is chore that no one enjoys. But a dirty box is a very common reason as to why cats will pee in places that they shouldn’t.
Used litter should be scooped out at least twice a day and fresh litter put in its place.
The entire box should be cleaned out – emptied completely, soaked in warm and soapy water with a few drops of bleach, drained, scrubbed with an enzyme cleaner, dried completely and refilled with fresh, clean litter – once a month
If the box is smelly or dirty enough that you wouldn’t want to put your face 6 inches from it, chance are your cat doesn’t want to either
Consider adding a second (or third) litter box.
One box per cat, then one extra
A good rule of thumb for cat parents is “one box per cat, then one extra”.
Even if you only have one cat, your cat will be happier if they have 2 boxes (wouldn’t you prefer a second bathroom too?).
If you have more than one cat, this is even more important.