I use those round Caliber's and haven't had any problems. Super easy to calibrate and batteries last awhile.

The Accurite hygrometer I also use and love it's cheap and very true. Plus Home Depot sells them and you can easily return if it's off too much Rh. I actually know somebody who retuned 3 till he got one that was perfect!

Question? Are you using a fresh boveda for calibration? I've never had success with the calibration packs. Always grab a fresh boveda close to my preferred Rh and throw in bag with hygro. Has worked every time

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