Awnings are typically cleaned by a professional with a high-pressure washer. The pressure of the water dislodges any dirt or debris that may be stuck to the fabric, and the soap helps to remove any stains.
Awnings can be cleaned with a pressure washer. First, the awning should be inspected for any damage. The pressure washer should be set to a low pressure and the nozzle should be directed at an angle perpendicular to the surface of the awning. The washer should then be moved across the surface of the awning in short, even strokes.