Humidifying Acoustics?? in Gibson Acoustic Posted January 2, 2011 · Report reply Just finished an experiment with my 63 SJ. A couple of days ago I placed it in front of the open bathroom door covered with a handkerchief except for the hole, during a 20 minute shower that typically sends steam the 9 meters to the closest windows and further. The guitar was extraordinary light weight which made the tone porous and the 3 high strings slightly unsupported, so I wanted to add more body. Don't know if anything happened. Then the day after I placed 2 smaller perforated plastic boxes with wet, not dripping, sponges inside the guitar in the closed case for about 20 hours - (okay removed one of them after 12). Think that worked. The guitar feels a little heavier and the tone is now somewhat grounded. The thing is that I didn't quite know what I was doin'. When to stop, if I could have gone further or went to far. How can one tell ?