How do I apply detergent with the pressure washer?

Set the adjustable nozzle to the low-pressure, fan-spray setting, then remove the detergent tank cap and pull the onboard detergent tank out. Fill the tank with detergent designed specifically for pressure washers, insert the suction tube back into the tank, and cap it closed. Apply detergent from the bottom to the top of the dry surface to be cleaned. After allowing the detergent to remain on the surface for a short time, rinse with clean water under high pressure.