Why is my SPX-FC34-MAX not dispensing detergent? There are four possible reasons why your SPX-FC34-MAX is not dispensing detergent: 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 the connections between the detergent bottle, suction tube, and foam cannon. Dilute the detergent with water. Blow out or remove any debris from the discharge nozzle using the needle clean out tool. Related articles What kinda detergent can I use with my SPX-FC34 foam cannon? What kind of detergent should I use with the SPX-FC34? Can I use my SPX-RB1 Pressure Washer accessory with the soap dispenser that is built into my SPX Pressure Washer? Pressure Washer Why is my SPX-FC34 not dispensing detergent?