It's not a very pleasant topic of conversation, but we all will encounter the need for a stain and odor product sometime in our pet's life.
Cats have a keen sense of smell.
Pet odor is protein-based and cannot be removed simply by washing the area. An enzyme product must be used to digest the odor-causing protein. It's important to follow the instructions for these products in order for them to be successful. First of all, be generous with the product and saturate the carpet. The urine most likely has soaked all the way down into the carpet pad and this must be treated as well.