I sympathize with your pain. It's frustrating when things seem to be going well and then, unexpectedly, take a turn south. Hmm, wrinkly rinds often indicates geo, which is quite abundant naturally. Perhaps that's the culprit? Could it be that something in the cave's cooling system, or air cirulation, etc, is harboring spores, so that wiping it down isn't going to get them? I'm sure you'll get some input and suggestions. I'll be watching this space as well.