I have niticed over the last couple years for sure that periodically, and with no real pattern, that there will be an almost geyser-like boiling in our fryer. We can have it quiet period with nothing frying, and then, without warning, it sort of boils up from the bottom like a bad monster movie. It doesn’t over-flow the fryer or anything, just really wierd.
I just figure that mositure dissolved in the oil concentrates somehow and ‘steams’ to bubble up to the top? Make sense, or am I the only one that has a creature living in my 50# fryer? :?