The Jabsco Quiet Flush electric marine toilet with fresh water flush constantly fills with fresh water. Jabsco's excellent technical video shows how to clean the solenoid, as small particles prevent the rubber diaphragm from sealing, and the pressurized freshwater system keeps filling the bowl to overflow. I need help gaining access to this solenoid. The head/shower compartment has no access panels to get to the solenoid behind the toilet, and neither the under-cabinet of the adjacent lavatory nor the side of the aft port locker have access panels to the area in back of the toilet where the solenoid is located. Cleaning (or even replacing) the solenoid is simple, if one could just access it. Anyone have tips on actually getting to this component? Thanks!