A dead battery after a couple of weeks could be due to a faulty battery or parasitic draw. Undercarriage washes help remove salt and sand, while spray wax is minimally effective and can smudge glass.

Some car issues can be really easy to diagnose, like a failed bulb, for example. Just put the lights on, walk around the car, and see which isn't working — easy! However, some issues can prove to be a ...