One of my dogs has peed on my backpack. It can’t be put in the washing machine, spot clean only. I soaked it a bit and sprayed with an enzyme cleaner but it smells worse than ever. Nothing I use to clean up pee ever works. Baking soda, vinegar, detergent, enzyme cleaners. Hydrogen peroxide seemed to activate it x1000. The smell is so potent and impenetrable. It must be one of the worst smells ever for getting out of things. Does anyone have any better methods?