calibrating hygrometer (non-digital)
Hello, I bought a new humidor for my husband as his old one was getting too small and is having trouble keeping proper humidity level. I'm trying to calibrate the hygrometer via putting it in the plastic bag with the salt/water mixture. After 19hrs it has only gotten to 68 degrees. I have it sitting on our kitchen counter. Is that normal? I can't check with my husband as he is in the Army and not home for the next 7wks. This is a surprise for him. Thank you for any help.