Over the last couple of weeks I noticed the RH inside drop by about 20%. When I glued the F-30 it was 58%-60%, today it was %42. I’m in Chicago and I assume everywhere in the Midwest and maybe Northeast saw a similar drop.
I try and keep my acoustic guitar at 50% (in its case), and I keep a big bowl of water on the radiator that’s the closest to where my electrics are. I use a Dampit, and also moist sponges in plastic soap boxes that I drilled holes in. I also keep a hygrometer in my acoustic’s case to monitor it.
This stuff is important!