The story: My dad died in 1996 and of course there were some things in storage that I haven't been able to get to until now. I was home in '96 for a few months, in 2000-2001 for 11 months and in 2005-06 for 10 months. Each time I had more work than free time. Now, I have some time to dedicate to cleaning and going through a lot of "left behind" items.
Dad had a corner of a storage in which there were several boxes. Most of the boxes were in shreds and dust due to bugs (some kind of termites?) The storage shed is primarily wood but the wood was only touched (slightly grooved out) where cardboard was laying against it. BUT in one cardboard box was an in-line humidity switch with an inlet and outlet cord. The inlet cord had worm/termite/bug holes in it. A couple of holes go down to the metal.
What kind of bugs will do this: (Click on the pict for a larger view.)