That’s the cool thing about medicine, you don’t “do” medicine-- you practice medicine.
And anytime you prescribe a drug, you are starting a trial. Because you really don’t know how it will do to that one patient. Experience may tell you that it should do what you expect it to do, (because it almost always does). But it could only partially work or do nothing, or have varying side affects, or even kill you patient.
As an ER director of a hospital once told me, “Despite all we think we know and all we think we can do for a patient. It still mostly boils down to keeping the patient amused and letting nature take it’s course.”
Yeah, it’s -11F/-24C right now and the humidistat is saying it’s 22% right now. Usually, in the summer time humidity ranges from 50% to 75%. But I have stored filaments like PLA and even PETG open on a shelf without care for over a year. Even now, the boxes they are stored in are not air tight.
I have never need to dry PLA and I do dry PETG occasionally if I really need that super clean print. Otherwise I just either manually remove the slight stringing of the PETG or I totally ignore it. I do keep a spool of TPU around and I do dry that before use. But it seems to holds up well for several weeks just hanging on the printer.