As the owner of a cat who has kidney disease and has had a number of accidents on my carpet I have tried everything to remove the odor but nothing has worked until now! When I first received My Pet Peed I immediately treated the known area I thought the odor was coming from. After two days the odor was still there to my dismay. After receiving a very nice email from Jerrett asking me about my experience with the product he mentioned using a black light to see if there were other areas I was unaware of. Sure enough when I broke out the light I found a few other spots. I treated them and am still jumping for joy that the odor is gone!!! YAY!! It is a bit pricey but well worth it especially after spending a boat load of money on other products that did nothing but mask the odor for a little while. I will be buying another gallon of My Pet Peed, it really works.