Dolphin, I am trying to visualize the problem. Could it be weight and
balance? The earring stud was either a screw thread, or a clamp on
that the finding used to stay in place. I know I lost many, both gold
and silver. I switched to the rubber or plastic to both stop loss and
to be able to sleep with the earrings in.
I saw several types of rubber/plastic push ons that remained firmly
in place. This was on top of either of the types of earring post.
None of which needed any glue to remain firm.
Have you thought about doing something to the eye pin to give a bit
of a better grip for whatever you decide to use? I think glue would
Cork just came to mind. Perhaps a pellet of cork?
Hope thinking out loud brings some more thought out responses for