I've always stored dipped mandrels inside where it's warm and then don't bring them out into the cold until right before I turn on the torch. When I'm done, I bring them in with me. I've always done this, whether it's extremely hot, cold or mild. I have no scientific reason, just my gut feeling lol...
I feel like since chunks of bead release get knocked off if I bump the mandrel against something too hard that it's not hanging on too tight, so changes in air moisture and temperature probably weakens it to the point where it just gives up. I guess?? >_<
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