I'm guessing this has been covered before, but being new to this forum, I'm looking for opinions (hopefully based on fact) on how best to store your guitars when not in use. My PSR and Les Paul are in their gig bags that sit in a stand up guitar rack. I also have a few acoustics and an Epiphone hollow body that I hang on a wall. I read recently that hanging guitars on a wall can, over time, damage the guitar. Anyone have experience with that? Also, what's a reasonable humidity level to store guitars in?