For much of the country, last winter was one for the record books. With spring here, take the time to give your car a thorough wash. At the automatic car wash, pay for the additional undercarriage wash option. During the winter months, deicing salts and grime can build up under the car. Left untreated, this can lead to corrosion or rust on your undercarriage. By thoroughly washing it off, you can prevent this damage to your car. Also, take an old toothbrush and brush off the white powdery residue on your car's battery. This is corrosion caused by winter weather. A dirty battery can prevent your car from starting.