Hiya Busso, I’d imagine that if you left the frames to warm to room temperature before wrapping them they wouldn’t have gone mouldy. The moisture around the frames when wrapped would have condensed on the cold plastic.
When I removed the frames I put them straight into a storage tub and purged the tub with nitrogen before sealing the lid. I opened them a couple of weeks ago and they seemed to be in the same state as when I put them in. I’m not sure if the moths weren’t active in the cooler temps and am not sure if the uncapped nectar is still OK I after being in an anaerobic environment for a couple of months. They went straight back into the supers and onto the hives. They weren’t drained and had some capped and uncapped cells, a good Spring starter I thought. We’ll see how it goes.
I’ve read about not giving honey to babies under 1yo due to botulism and would wonder what other nasties may have cultured on the frames? @Dawn_SD?