Humidifying Guitars

Musik Tent at about 12 hours after setup, in the upper 30's when I checked this morning. So, I increased the amount of exposed filament about 1.5 hours ago and humidity has increased into the 40's. Will check after work and report. Target is between 45 and 50% RH. Photo on right (below) shows reading of 41% RH at top of the body near the strap button/output jack and 40% inside soundhole. Two additional probes at headstock and neck/body connection, also reading about 40%, so a reasonable comparison is made with the guitar case study.