Never want to bypass the FOBs while cleaning. There will be a lever that you can turn up to prevent the float from seating. This is the cleaning position as well as the mechanism to assist in freeing a float that is ornery.
While circulating, vent the FOBs briefly and then due the same when you rinse. This will assist in preventing the vents from sticking. Always use a cup to catch the fluid coming out of the vent. Is this the
FOB you are cleaning?
Scott Zuhse, Instructor
Micro Matic Dispense Institute