Last year my AC wasn't working very efficiently. I took it to a local garage where they topped off the coolant, which the mechanic said wasn't too "down" and cleaned out some part in which he said mice had built a nest. He showed me a fist-sized wad of what looked like chewed up fabric. Even though after having it serviced, it was better than before, but not like it originally was. This year it is not cooling and I suspect the AC is again clogged with mouse debris. My car is always parked in an above ground garage when not in use, but being in a suburban setting, a wood frame garage would not be much of a deterrent to mice. Is there a way to keep mice out of my car's innards?