Pinpointing exactly where the urine smell is coming from is difficult when using only your nose. Use Pee Detector Blacklight to locate the source of the smell. Injector cap allows you to inject the formula to the base of the stain. The advanced enzyme-action formula removes the toughest urine stains and odors. Pee-Eww is uniquely designed to fight difficult to remove stains, including cat urine.