When you’re not actively cutting, have a door of some sort at the back of your machine separating it from the outdoors. It’s that easy 
I use this one:
There are easily purchasable ones:
https://www.amazon.com/s?k=blast+gate
Some folks actually disconnect their hoses entirely (using quick disconnects of many sorts).
YMMV, but it’s an easy fix. I live in Indiana so get both humidity and temp changes with no issues.
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