When cleaning with a pressure washer, some cleaning tasks can be solved with water alone, but for most tasks, cleaning with detergent allows for more effective dirt removal.
Use only detergents specifically designed for pressure washers, such as:
IMPORTANT: DO NOT USE household detergents, acids, alkaline solutions, bleaches, solvents, flammable material, or industrial grade solutions. These could damage the pressure washer. Many detergents may require mixing prior to use. Prepare the cleaning solution as instructed on the solution bottle.