Heat speeds the drying of soap and water, making washing more difficult and increasing the chances that spots or deposits will form.
2.
DON'T MOVE THE SPONGE IN CIRCLES
This can create light but noticeable scratches called swirl marks. Instead, move the sponge lengthwise across the hood and other body panels.
3.
RINSE ALL SURFACES THOROUGHLY WITH WATER
Once you begin, concentrate on one section at a time, washing and rinsing each area completely before moving on to the next one. This ensures that you have plenty of time to rinse before the soap dries.
4.
WORK THE CAR WASH SOLUTION INTO A LATHER
With plenty of suds that provide lots of lubrication on the paint surface. And rinse the sponge often. Using a separate bucket to rinse the sponge keeps dirt from getting mixed into the sudsy wash water.