Where Did That Smell Come From???
Let's say you recently purchased a home with carpets installed. Prior to move in, you decide to have the carpets cleaned, hoping to refresh the carpets, maybe remove a few stains. Upon cleaning of the carpets, you notice a urine smell coming out of the carpet.
Unbeknownst to you, the prior homeowner(s) had several pets over the years, and their pets had "accidents" on the carpet. Even worse, the urine seeped into the carpet pad underneath the carpet. What is now happening is that the steam from the extractor is drawing the urine odor out.
Prior to cleaning, use of a black light is helpful to determine if urine stains are present, enabling your service provider to treat these areas appropriately.
If the urine has seeped into the carpet pad underneath the carpet, you may need to pull up the carpet and have the pad replaced.
A thorough inspection by your service provider prior to cleaning makes all the difference in what you see and what you smell.