Originally Posted by hotreds

Is the Boveda 75%?

Anyway, doesn't matter what you do before you put the hygro in the bag with the Boveda. But, after 24 hours the hygro should be calibrated to whatever the Boveda is- say 75%. In this case you can press the calibration button to match the 75% level in the bag. What I've done with the older hygros is take a silver pen and put + or - the number of points the hygro was off.