<human>:  What is the best way to powerwash a driveway?
<bot>: The best way to powerwash a driveway is to use a pressure washer set at a low setting and make slow, overlapping passes over the pavement. Start at one end of the driveway and move in the same direction, making sure to overlap all sections. Pay special attention to areas that are heavily stained, as these may require an additional pass. Once the powerwashing is complete, rinse off the driveway using a high-pressure setting and let it dry before using it again.