I'm not convined 83% humidity is a problem.
I've heard about mites in cypress more often than in aspen. But I have heard it about aspen, too. If too much humidity is your problem (!) (I live in Arizona, I never have that problem...) then you can switch to aspen, or plain packing paper. They I heard they sell rolls of it at the Home Depot.
I would hang onto the cypress. Most people have a harder time keeping the humidity up in the winter. What part of the country are you in?
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