Ok y’all. So I did a bit of an experiment with my Nacelle the last time I noticed the wingthings. I wiped down MOST of the underside of the wing with an alcohol wipe, save one or two spots that did not have the gunk on them. I figured if my theory is right about my Nacelle’s wings being covered with nascent mold spores (that are probably due to a facility or production line-wide contamination), then I should see some more growth in those two places in a few days/weeks. Was casually curious about it earlier today, so picked up my guy just now - sure enough, though teeny-tiny, there was one white web nexus thingus that grew in one of those spot. No where else on the wing however.
Seriously, if this wasn’t an animal then it wouldn’t grow like this. This had to come from a place/line that only manufacturers the wings or something.
Anyway, wipe the wings down with an alcohol wipe. Your Nacelle will thank you. And so will your living buddies with allergies.