Ok please be patient..... true this may have been covered before but I’m still confused. I just bought a Martin Road Series acoustic and want to keep the top from cracking so I bought a small humidifier for my room. The region I live in is quite dry most of the year so this seemed like a good move. Now I see reference to suggestions of a 40% (approx) humidity level to protect an acoustic but....... how long is it safe to remove the guitar from that environment (gig) before the guitar dries out excessively? Hours? Days? The Road Series guitars are not that pricey but expensive enough to protect. This region probably averages 25% humidity most of the time.