Some of us really take a good care of their car, washing the car once a week is a must for them. And some of us did not really care about it. Letting the car get so many dirt accumulated is really not good coz as time goes, the dirt will damage the car paint and body surface. Especially when the car is parked outside with so many exposure to direct sun light and acid rain. The dirt will enhance the skin defect.
It is adviseable at least once a month for you to wash your car. ( basuh kereta sebulan sekali) just spend rm6-rm10 for a car wash service charge.
Picture shows a car with so many dirt. And the funny thing about it, someone made an artwork on it. :-D