There’s no surefire way to get mouse smell out of car vents, but some methods may work. One option is to pour a pot of boiling water onto the mouse and then place the pot in the vents. The mouse will likely try to run away, and the boiling water will kill it. Another option is to put a cloth over the vent and leave it there for a few hours. The cloth will trap any mouse droppings that may have been left on the vent.
