Washing your driveway from time to time helps to get rid of any debris on your driveway. From time to time, oil, grease, and dirt build up on your driveway and can make it look unpleasant. Using a power washer can help to get these things off your driveway and make it look brand new. Washing your driveway can also help to increase the lifetime of your driveway because it helps to stop algae and moss from growing on your driveway and eroding it.