How low humidity is too low?
If it's been in the 40's recently and you have your guitar in the case when the humidity drops to the 30's for 1 day. Your guitar will typically be fine. If the humidity is going to remain low, then you should consider a humidifier of some sort. I would by no means be panicked or worried at this point.
How long before your guitar gets damaged is a tough question for me to answer. Maybe others will chime in
|