Thanks for the beginning explanation Lucy. Seems spot on.
But my collection being indoors and the fact that it should be insect free is hard to imagine.
I always figured that in a tight enclosed situation, as drafty as this house could be, insects can repeatedly invade my home. Plus, maybe being built with a crawl space, no basement, has increased my exposure.
I go from 19% humidity for roughly 4 1/2 months, to 55-85% humidity for 7 1/2
Months doesn't help. My light levels are constant naturally but 80% plus of my collection spends 5 months outdoors. That provides an avenue to gain entry.