Interesting, Do you have pet odors, smoke odors, allergies, asthma or mold in your home or office, then here is an interesting overview on pet odors specifically and an experience I discovered the hard way. Others have had the same or similar issues with pet odors, so live and learn not to get burned when you have your carpets professionally cleaned. Notice how they will ask if you have pets, this is so they can upsell you on what turns out to be a Febreze treatment which you can do yourself for a few bucks, not $40. which I was quoted for. Here is the story many have experienced with steam cleaning of rugs. I had same experience as many have, and when I was asked by steam cleaner if I had pets, I said yes, but my dog never urinated on carpet and my cat stays in shed since I have allergies. Well, as with others, when carpet was steam cleaned, the smell of cat urine was overpowering. When I too questioned steam cleaner, he suggested he comes back and use sanitizer on carpet at an extra expense which I refused when first offered it due to the fact I knew my dog never had an accident on carpet. Since I don't know if previous owners had cats, I didn't see any obvious stains, just overall didn't want to move into a house without cleaning carpets even if they were not dirty looking. I am clean freak, so I reget having carpets cleaned as the smell persists weeks later. When I learned what steam cleaner uses if you had pets, it is nothing more than fabreeze treatment which anyone can buy cheaply and use, what a shock to think they wanted to charge me $40.00 for a fabreeze treatment. lol Anyway, this didn't last as I sprayed fabreeze several times, and I can hardly stand its smell too, but better than car urine. Long story short, I was introduced to an air purifier system for free trial, so being desperate, and not wanting to replace rugs having just paid for move, I said, sure, let me try it. Green-Homes.com dropped off a small unit wich I placed in living room which is about 900 sq. ft. is size. I was amazed, the very next day after running unit overnight I could not smell the car urine any longer. I then tried not using it for the next night to see if I saw any difference, and low and behold, odor was still gone, and I have a keen nose given I have had allergies and asthma for decades. OK, so the unit worked, and it was only $100., but if it worked that quick, I figured why spend the money if odor was gone in one day. Well, you guessed it, odor started to come back after one humid day a week later, so it is definately moisture related which activates old car urine smells. YUK. Well, needless to say I bought this air purilizer and when needed, I plug it into my living room outlet and keep it my my dogs bed the rest of the time, and low and behold, my allergies and sneezing and wheezing have deminished to the point I can breath at night while sleeping and have stopped going through a box of tissues every few days so I should get a return on my investment on tissue expense in first year. LOL I don't know if it will totally eliminate car urine odors and allergins in general, but it sure is getting better after just a few weeks and now I just leave it on by dogs bed and it seems to keep the odor from coming back even on severe humid days which we have experienced this summer for weeks on end. Some of the other benefits I have seen is less kitchen and bathroom odors too, amazing little device is all I can say. Given I have had mold issues too, I am trying it out in basement next and will post results. Success to all, http://GREEN-HOMES.com