Finding the Source of the Problem:

Along with our noses and some deductive reasoning,  the UV light has proved to be a very helpful tool in tracking down bad odors. The UV light highlights the urine trails on the floor, allowing us to track down potential rodent hot spots. It didn’t take long to find this “hot spot”…

UV light on toilet

Fortunately, we were able to trace the odor it to an exterior wall where mice were falling down and getting trapped inside.

mice in wall

After carefully removing the baseboard, we cut out the drywall and extracted the mice, cleaning and deodorizing the wall cavity.

mouse cleanup

here is a link