My husband's a spic & span military type with a horror of Pee Smell, so I had to find something EFFECTIVE to clean up after my fosters dogs that was also safe to use around Basenjis–who are even more sensitive to VOC's in the environment than other breeds. I did a lot of research and the trick is to neutralize the acidic urine with an alkaline substance. Nothing I bought worked very well, or it was crazy expensive and contained questionable ingredients, so I experimented with vinegar, lemon juice, borax, baking soda and washing soda. The following recipe is fabulous at neutralizing urine odour, plus it disinfects and cleans. It even removes the burned coffee smell from plastic coffee machines--give it a try. You can omit the Borax, but it won't work as well and you can easily find Borax in the cleaning section at the hardware store. Try throwing a 1/2 cup in the washer to boost your detergent, it really helps.
1/2 cup baking soda
1 tbsp powdered Borax (eg. “20 Mule Team”—note: NOT Boric Acid, it isn’t the same thing)
1 tsp liquid soap
1 cup boiling water
2 tbsp white vinegar
1 tbsp lemon juice
Thoroughly dissolve baking soda, Borax & soap in boiling water, then add vinegar & lemon juice. Mixture will fizz, so use a large bowl. Fill spray bottle 2/3 full, allow fizzing to subside, screw top on loosely. Wipe up puddled or dried urine, then spray mixture generously over area & allow to sit for 5-10 minutes, then wipe with damp cloth.