Do you often wrap stuff up like that for storage?
We have some moisture sensitive raw material that we buy in at work comes with desiccant sachets that are the size of the palm of your hand
I wrap and store parts in the same way with stretch film but I always place a few sachets inside
Copes really well with temp change related condensation
Ian - Yep works for me too - especially where I'm not going to be needed whatever it is for several months