Use only detergents specifically designed for pressure washers, such as Sun Joe HOUSE + DECK WASH, Sun Joe SNOW FOAM AUTO WASH, or Sun Joe HEAVY DUTY CLEANER.
Do not use household detergents, acids, alkaline solutions, bleaches, solvents, flammable materials, or industrial grade solutions, as these could damage your pressure washer. Many detergents require mixing prior to use, so be sure to follow the instructions on the bottle.