These cleaners contain special enzymes that convert organic waste materials such as urine and feces to carbon dioxide and water.

The chemicals interfere with with enzyme process.

-Enzyme solutions are available at pet stores and do a great job of eliminating odors because it's basically good bacteria eating bad bacteria.  

The bathroom floor and part of the subfloor in the hall and kitchen would have to come-up; the wall between the bathroom and hallway and across the end of the hall would be going back to the studs; the common wall between this apartment and the adjacent unit would need to be brought up to current {fire} code; the ductwork for the HRV needed to be replaced; and three of the existing windows had broken thermo panes.We also planned to improve the energy efficiency of much of the envelope during this renovation - the amount would depend upon what we found behind the drywall.What we found:The damage to the subfloor on both levels was more extensive than forecasted and I wasted two weeks, and a few hundred dollars in materials, over the holidays in December trying to remove the smell of pet urine (ozone, enzymes, sealant, etc).  

The enzyme odor remover combined with the use of an ozone generator seems to be working.

Washed with TSP and Enzyme treatments.

Apply enzyme detergent, blot. 4.

It's better than Kilz and I wish I had known about it when I did mine. http://www.biggerpockets.com/forums/67/topics/78889-smoker-rehab-keys-to-success-with-tobacco-smoke--before-after-picshttp://www.biggerpockets.com/renewsblog/2012/11/05/getting-rid-tough-odors/I know for pet odors there are some enzyme neutralizers, you may want to get some for the sub floor under the carpet areas help with that.http://www.biggerpockets.com/forums/67/topics/74253-cat-pee-in-concreteThe biggest cheap first step is to just literally wash everything down.

We close on it next Wednesday and I have done quite a bit of research on how to get out the smell.I purchased a product called " Mister Max Anti Icky Poo" weird name I know, but this is an enzyme that will break a lot of the chemical bonds in the urine.

It is an enzyme that actually eats the urine.