Pressure washers are commonly found at your local car wash. They use a high pressure water spray to remove dirt and debris from objects. Because of the effectiveness and ease of use, many home and business owners use pressure washers to clean the exterior of their buildings. To maximize effectiveness, some pressure washers use cleaning media along with water to clean surfaces. A common medium used with a pressure washer is baking soda.
Perform an initial cleaning of the surface with water only. Use the pressure washer to remove any loose dirt or debris before starting.
Ensure that your pressure washer can accept a cleaning media. Your pressure washer should have a water tank that you can pour baking soda into. If it connects directly to a water supply, it will have a separate tank dedicated solely to cleaning media. Refer to your manufacturer's instructions and manual to determine if your machine is capable.
Add baking soda to your water tank or media tank. If adding directly to a water tank add one part baking soda to eight parts water, or one 16 oz. box to 5 gallons of water. If using a dedicated media tank, pour in baking soda as needed.
Adjust the pressure nozzle tip to spray between 5 and 50 degrees. This more concentrated angle will perform a deeper cleaning.
Start the pressure washer engine. Spray the pressure washer in an inconspicuous area to test the media. This ensures that you will not damage the surface that you are cleaning.
Clean the entire surface with your pressure washer, concentrating the spray on the worst areas. Spray until all spots are removed.
Pressure wash the surface again with clean water when finished. Rinse away any remaining baking soda residue from the surface.