Also just read, to my chagrin, that apparently the food safe lube I used (because I had it on hand, vs silicone) is mineral oil based, and mineral oil, in turn, is not recommended for certain types of rubber--causes rubber to swell, turn brittle, and crack/break. Heads up
@jfk69
Not sure I'm going to go through the trouble of trying to clean it off with isopropyl and q-tip--but putting it out as a PSA, that
@prm is actually correct, seems like silicone based is the way for rubber. Will update if I wind up with o-ring failure.