Hi there
sorry to hear about this have had the same problem myself in the past. I found that putting down an odour neutrilising carpet powder after giving the area a thorough clean helped. If possible lift the affected area and put it underneath the carpet as well and leave to sit for 24hrs before you hoover. do it at least twice and you should get a definate improvement. well mine no longer smells and it was bad.

Kittiemom-I can totally sympathize! I have a cat that is peeing all over my house and have tried just about everything to get the odor out,to no avail! There have been several recommendations mentioned,one of which seems to be most popular(but didn't work for me)is Nature's Miracle.You can order it online and I think most Pet Smart stores carry it.I just saw a commercial last night advertising Urine Gone,which I think I will try.Just Google it and there are several resources for ordering it.The one on TV even sends a blacklight for detecting the urine stains,which would be a good thing to have.If neither of those products work for you just Google pet stains and odors and there are a lot of other suggestions to be found.Good luck!......Lillie

Thanks for the suggestions so far! Please keep them coming! I think it may have been stress from moving that triggered them to start. Then when we cleaned it all the smell probably wasn't removed, so they kept going back. They NEVER did this when we were in our previous home. Their litter boxes are clean, so that's not the problem. I'll be so happy to find something that works - the ammonia smell makes me sick. We've tried Simple Solution & the smell is better but not yet gone.

The pet urine remover that works best for me is Simple Solution. It's also the most economical because it is available in a concentrate that mixes with water. You MUST follow label instructions EXACTLY in order for it to be effective. Drench the urine stains so that the solution goes through the carpet, through the pad, and into the subfloor. That's the only way to eliminate all sources of the odor. Also, if you have used other cleaning solutions previously, you need to follow SS's label instructions to remove the cleaner residues BEFORE applying SS itself.

A blacklight is invaluable for locating urine stains. Urine glows under blacklight in a darkened room, so you can find and treat stains that you may otherwise overlook.

Laurie

Someone mentiond something on my thread about my peeing cat that might be worth a try also.Ellen said that she had used a citrus spray where her cat was peeing and on things that might be peed on to deter the behavior.Maybe that would be worth a try to deter the cats from peeing in the same place again.I am going to try it and see what happens.......Lillie

Catteries use a product called K. O. E. (Kennel Odor Eliminator)...I have used it myself when I fostered cats/kittens.

They have it at KV Vet Supply....

Here is a link that might be useful: K.O.E.

When my cat was sick he urinated on the carpet. I found Nature's Miracle to work, but you have to follow the directions exactly and absolutely soak the carpet to the floor and allow it to dry over a matter of weeks. It did eliminate the odor.

As many of us have mentioned on many posts like this, cats usually soil when they are ill with bladder or kidney infections, especially if the cat usually uses the litter box, so consider looking to the vet to see if your cat has a urinary tract infection.

Keep in mind that cats and dogs can smell things we can't. If there were cats living in your apartment previously, your cats may be able to smell any old urine spots, even if the carpets had been cleaned(especially if the pad or subfloor wasn't treated) or replaced.
Most odor eliminators use enzymes that take time to work and as Elly_nj said, you have to soak all the way through to the floor. I have used Nature's Miracle more than any other and it has always worked for me, but at times I've had to pull up the carpet and soak the backside, pad and floor to get the job done. Also, if it's mainly a couple of problem areas, after you treat those areas, re-arrange the furniture if you have to, to keep your cats from getting to those spots. Good luck.

Simple Solution has worked great for me on laundry that got peed on by a cat. - Ellen

My vet recommended Anti-Icky Poo. I've been using that on our floors and it works well. We use it on hardwood but I think it's more formulated for carpeting.

Here is a link that might be useful: Anti-Icky Poo

I use OdoBan - sold in gallon size at Sam's Club or in spray bottles at area grocery stores. I should buy stock in the stuff!

OdoBan has taken out every odor I've tried it on, including cat pee. It does leave its own smell, but that dissipates after a while.

What it won't do is remove the stains, its strictly to just get rid of the stink. For stains, I use Spot Shot.

Good luck!
Sher