Cinnamon granny try mint in your car nice smell and mice hate it… if you keep letting mice into vehicle soon you will have electrical problems as they chew wiring and go to the heat of warm circuitry.
I put dry rice in an old sock and treat with mint, keeps the inside fog down and mice out you can tell when it fails as you will see rice grains.. if you treat rice with plaster powder mice will only eat it once the plaster sets when inside them.. but plaster only sets once so no chance of killing pets or prey animals.