Troubleshooting 5 Common Sink Soap Dispenser Problems 3. Does Not Discharge Soap. When the sink soap dispenser is full but does not release any soap when the trigger of the pump is pressed, the problem may lie with the tube that gathers the soap. Unscrew the pump so that it can be properly examined, and make sure that the tube is properly attached to the top. If the tube is not properly fitted, it ...