Newbie here, I have my ar15 on a wall mount behind my clothes in my closet. My closet is in our master bath. I've had a pistol (brand new!) get rust and pitted after I oiled it and wrapped it in a silicon cloth and putting it in it's original plastic box. My other pistol has been in the nightstand drawer for many years and is clean as a whistle because it is in a controlled environment. Nevertheless I learned my lesson and now I'm worried that the humidity of the bathroom will affect my AR. It's been a couple of months now and no sign of rust/pitting but can this location be harmful??