LindsayG
Avid Member
You take a Tablespoon of table salt, add a few drops of water to make it sticky, and put it in a sealed bag or container with the hygrometer. In six hours it should read 75% or the gauge is off. Salt likes to be at 75%, so it makes the sealed area that humid. If it's an adjustable gauge it can be set at 75%, and if it's not and it's reading close you can do mental adjustments instead. Something way off should be exchanged or replaced.
O wow thank you. I've never heard of that and had no way of knowing if my meter was off. I'm going to try that when I get home. Thank you!