I don't mean to slag a mfgr but, dampit's are lousy for guitars. I do use it on my mando and fiddle but only because it fits in the "F" hole.
There is too great a possibility for dampit's to leak water onto a brace seam if you are the least bit careless in removing the excess water. Then, when the excess water is removed, it's capacity is far smaller than what a guitar needs in 35%< humidity.
Just my opinion ...fwiw.
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