In my mom's car, I always figured that it was the car building up static, as I couldn't figure out a way that I could really be generating it inside the car. So I figured that if I got out of the car, then touched it, it got grounded through my body. But if I touched it before and while I got out, that my body was enough of a capacitor to slowly drain that electricity to ground instead of doing it instantaneously. But that's pseudo-science mumbo-jumbo, even though it made sense to me. Regardless, it always seemed to work. You can give it a shot; it couldn't hurt. Well, at least not any more than it currently (no pun intended) does.