Pre-scrub the exterior by using a scrub brush or spray having a yard hose to remove any Filth, debris or mildew. Never ever point a pressure washer at Others or Animals. Putting bleach in the pressure washer will crack it. Pressure washer Secure detergent and cleansing answers can be obtained, https://pressurewashing73455.mybuzzblog.com/19269820/pressure-washing-fundamentals-explained