Urine odor comes both from the urine itself and from the bacteria that uses it as a food source. With repeated contamination the bacteria receives a regular food supply and can thrive in the warm, wet, acidic climate. This bacteria dies and breaks down and off-gasses producing an ammonia smell as it goes through the complex organic change.
The salts that accumulate after the organic change and drying of the urine act as a desiccant to attract moisture. This is why odors that have seemed to have gone away reappear on humid or rainy days when a deposit is not properly treated. This is also why we recommend treating the urine before carpet cleaning, as the water will activate the odor. As the moisture that is introduced to the salts evaporates, it will produce the familiar ammonia smell as the off-gassing continues.
Do you have a 100% Guarantee on Pet Odors? We will do everything possible to help eliminate any odors in your home. Unfortunately, there is no way to completely guarantee odor removal of any type. The reason is that the odor may not only be in the carpet. It may be under the padding, on the cement, or in the wood beneath the carpet. It may also be on the baseboards, drapes, walls, etc. While every attempt is made to fix the problem, there are times when multiple treatments or more extensive treatments are needed. Urine stain and odor removal cannot be fully guaranteed. If we perform a LEVEL 2 or LEVEL 3 urine remediation, we will return within 14 days at no charge to retreat any areas where existing odors have not been completely removed.