Frequent Washing
Throughout the winter, it's a good idea to wash your vehicle every 10 days. It's best to wash the vehicle on days when the temperature is 40 degrees or more, and it's preferable to do so during the daylight hours so there's ample time for the vehicle to dry before the evening temperature drops.Whether washing the vehicle at home or at a car wash, use fresh water and a high-pressure hose. If washing at home, add baking soda to the wash water in the winter o help dissolve dried salt on the vehicle's surface. Warm, soapy water (not dish detergent) and a sponge or wash-mitt can be used. Shop rags can contain bits of metal, so these are not a good choice since the vehicle surface may get scratched. Be sure to wash behind the mud flaps, under the door handles and in all cracks and crevices of your car or truck. The undercarriage should get particular attention, especially in hard to reach areas where salt buildup can occur.