Age old question--decent hygrometer

[Mister Moo]

...but you know, some of us are just so OCD that we gotta have that hygro working also

I understand. Why, I still calibrate my fingers twice annually with salt.

[dinoa2]

I onlymentioned the salt test to say I was satisfied with the hygro being seemingly accurate. The salt test , by some quirk of nature or whatever, is supposed to produce 75% Rh so you can gauge your hyrgo by that and know if it is reading high or low. I use boveda packs and probably could toss one in a plastic bag with the hygro to see how it reads cause boveda says their packs will read what they say when in a plastic environment. Now that you mention that, I might just use a new boveda pack to test any new hygros. But back to my pesky hygro, fiddled with the battery and back cover last night and it started working again.