Daddario GH Humidifying System

Basicly it is a sponge ...in a black plastic container.....sometimes simple things just work....

Soak the sponge in water....
Rinse it out so that it does not dripple any water....
Put the sponge back in the black plastic containers....
Put the lid on it
Dry the container in case it got wet in the process.
Put the container in the body of the guitar the top resting on the 2 of the middle strings holding it in place.
Recheck the sponge to see if it gets a little dry.....if so repeat the process...

Works best when the guitar is in its case....

I bought this humidifier because my guitar is always in a stand and the humidity levels were about 30%. I already knew that this humidifiers work best in a closed environment, however I preferred to risk dryness of my guitar instead of having it perfectly humidified in the case but playing less with it. For that reason my expectations were quite low with this product. I can assure you that I was wrong. If I damped the sponge early morning It will keep the moist until the next day and, because the humidifier was inside of the body of the guitar I'm certain that the moist was absorbed first by the wood of the instrument and only then was released to the environment. There are several good point in this humidifier: it's easy to remove; it doesn't need expensive refills (deminiralized water is all it needs); it doesn't touch the wood of the guitar; it is inserted deep into the soundhole.