Washing your own car at home if not done the right way, instead will make the paint can not be shiny again. For that there are things to consider in a car wash as follows:
Before the car washed with water, clean it first with quill / feather duster while not dusty, because dust particles can cause scratches on the car body.
Perform a job washing cars during the hours of 8 am below or above the 5 pm to avoid the blazing sun. Remember! Cars do not get wet in the sun, because the water droplets that are like a magnifying glass that can damage / burn the paint.
If forced to wash the car at night, brush your car until it is completely dry, then all the car doors opened and then closed with a rather loud over and over again so that the water was still in the cracks can come down and do not settle on a car that can lead to carats.
Use a special shampoo to remove oil from automobile combustion of other car that contain oil. Because at the time of the car on the road there are a lot of fumes from other vehicles such as diesel fuel, motor 2 stroke, etc..
If there is no special car shampoo, use a hair shampoo that contains no detergents, shampoo your hair the way they will pour the sponge onto a special car.