2012 Toyota Tacoma - Mouse Excrement in Vents

How do I clean up mouse poop and pee in the ventilation system?

The best way is to take it all apart and clean with strong anti-bacterial cleaner. But that is a pain. Try flushing warm water and Odo Ban or similar cleaner poured into the air vents at the base of the windshield each night for a couple or three nights. That might get it clean.