I just bought a used mandolin on the classifieds, and when I received it it seemed very dry and very low action, fretting out up high. The truss rod was backed off all the way, but sill very little relief on the neck. I figured this mandolin must have been kept without a humidifier for a long time. So I put 2 dampits in the case with it along with my "digital weatherman" and it has been improving a great deal. Every time I take it out of the case to play now, it has gone sharp. Am I correct in assuming that the body is "swelling" as it absorbs the humidity?
If the mandolin is dry, will it "suck" the moisture from the humidifier till it has reached it's optimal level, or will it keep "sucking" till it explodes? Do I have to worry about over humidification?
Digital weatherman says the humidity in the case is about 55%, is that too high?
I've always just kept a case humidifier full and kept the mandolins in the case. Is this a good method?
My other mandolin doesn't go sharp in the case, does that mean it's at "humidity equilibrium"? Will my new mandolin get to that point?
How long does it take to re-humidify an instrument in the manner I am using?
How long does it take for a mandolin to dry out if left in a room with humidity in the low 30%'s?
It's amazing that the sound is becoming so much better as it is humidified.