Why is my SPX-FC34 not dispensing detergent? Your SPX-FC34 foam cannon may not be dispensing detergent because: The detergent container is empty. The detergent bottle or suction tube is not properly connected. The detergent is too thick. The discharge nozzle is obstructed. Solutions: Add more detergent, check connections, dilute detergent, or clean nozzle. Related articles Why is my SPX-FC34-MAX not dispensing detergent? What kind of detergent should I use with the SPX-FC34? Is the SPX-ACS-MAX accessory compatible with my SPX Series Pressure Washer? Will my SPX Pressure Washer accessory work with the on-board soap bottle on my unit? Sun Joe SPX-HDC1G House + Deck All-Purpose Pressure Washer Rated Concentrated Cleaner | 1 Gal.