We had trouble with deer mice eating car wiring. I found this spray at the feed store that looked to be a sort of small outfit based on the label. It was hot p

We had trouble with deer mice eating car wiring. I found this spray at the feed store that looked to be a sort of small outfit based on the label. It was hot pepper extract, diesel, glycerin, a few other ingredients. Worked really well. But then it disappeared so I made my own. I bought a few bags of dried cayenne peppers, crushed them and soaked them in acetone (no I didn't care if the mice got cancer at that point). Then filtered and discarded the remaining pepper chunks and let the acetone evaporate in a pan outside. I then got a few glycerin suppositories from the pharmacy and mixed with kerosene, the pepper extract and a little peppermint oil and had my own spray. A few times a year I spray down the engine blocks and wiring harnesses and we haven't had an issue since.