No need to kill them—just let them know it’s time to move!
There are numerous products on the market as well as some cheap home brew options for deterring pests with scents. Some of our users like using cayenne pepper or WD-40 around the potential entry areas (door sills, window frames, etc). Another option is peppermint oil, which pests don’t like and it’s an all-natural option. You can also soak cotton balls with peppermint oil and place them strategically (i.e. inside the engine bay during storage).