Today, I swapped the screws that held on the RHP for bolts threaded into brass inserts.
Hopefully, this will be more secure.
One of the reasons, the screws didn't work is that the top of my enclosure is warped. This prevents the RHP from fitting flush against the ceiling. I tried to counter that by screwing them in really hard, but that put a lot of pressure on the screws. Add Wiggles trying to worm his way in there and it was too much for them. Hopefully, this does the trick.