What kind of detergent should I use with the SPX-FC34? Only detergents specifically meant for pressure washers (such asSun Joe HOUSE + DECK WASH (SPX-HDC1G), Sun Joe SNOW FOAM AUTO WASH (SPXFCS1G), or Sun Joe HEAVY DUTY CLEANER (SPX-APC1G).)should be used with theSPX-FC34. Related articles Why is there no detergent coming out of my SPX-FC34? How do I assemble my SPX2599-MAX? Shop Joe Detergent and Usage How should I store my trimmer when not in use? Sun Joe SPX-HDC1G House + Deck All-Purpose Pressure Washer Rated Concentrated Cleaner | 1 Gal.