mattypacks
Well-Known Member
One thing to note too is to make sure you calibrate your hygrometers. Fill up a bottle cap with salt (about 1 teaspoon) and a few drops of water on the salt to make it damp but not soaking. Place both the hygrometer and cap into a little ziploc or sandwich bag and leave for 6-8 hours. The humidity inside the bag should be at 75%, so adjust/mark the difference.Haven't seen it mentioned but a pack of 4 hydrometer is like $14 on amazon. Its worth the investment
I did this with that 4 pack and got different readings for each between 5-10% and wrote on the meter what the difference was.