Do any of you keep a piece in your car? I'm thinking about having one for home, car, and person, with a couple of extras for plinkin' fun, of course. Anyway, I'm curious about proper care and if there are temperature concerns I shoupd be aware of. I have no problems with the understanding of cleaning, but need to know if there are any other considerations, such as temp limits, I should keep in mind. Thanks fellas.