Trust me this works. Get a dog and have it poop on the cat's urine. The area will no longer smell like cat urine, but dog poop instead.
Ok, actually THIS ONE works. Trust me, I know. Everyone has talked about cleaning the stain but odors are a lot more tricky. You can clean the area but you'll never be able to clean ALL of it out because it will have penetrated areas you can't get and it will still smell. You need to treat the odor.
Cliff Notes Version of my story:
Driving some lunch to a client. One dish was a huge 24" x 12" x 8" juicy tray of corned beef and cabbage. It was nearly filled to the top with a salty brine of stewed beef and cabbage juices. Had to make an emergency stop and WHAM, the entire tray gets dumped into the back of my MDX. The entire back is drenched in corned beef, cabbage juice, you name it. It’s in every nook and cranny, completely soaked the carpet through, down every crevice. It was so bad, I actually saw it drip through my car and down underneath on to the road.
Finished lunch and rest of work day. Took the car home and did a major wet dry vac and cleaning job. Pulled as much carpet as I could (soaked all the way to the metal and beyond). The next day, mmmmm yummy car smelled like left over corned beef and cabbage. The day after, started to smell a bit funky; all the while using carpet cleaners, baking powder, febreeze, laundry detergent, air fresheners. Third day, car is nearly unbearable. Smell like a combination of wet dog, sour milk and rotting meat. Have to drive with windows open. I try every trick in the book, more Febreee, more cleaners, more baking powder, more air fresheners. Gets better, but can still smell it.
Finally here’s the trick that works. Overnight, leave open a huge tray of vinegar and close all the windows. The next day car reeks of vinegar, but as the smell goes away, car starts to smell fresh again. Again, another over night tray of fresh vinegar. Car reeks again of vinegar but takes more of the odor away. Eventually, smell goes away completely.
So there’s the trick. If you want to eliminate odors, overpower it with vinegar. As the vinegar smell dissipates, it will take the odor with it. Either that, or it completely destroyed my olfactory glands to the point where I can smell anything at all.