i am buying a ml cost 500 buck plus my shotgun soon will be getting a high power rifle for target shooting

i am going to add a steel entry door to my closet on my room
it is about 6 by 6 and turn it into my gun room must my clothes lay in my dresser
any way
i will be going with a DEHUMIDIFIER

like others said out of the case open the action and let them air out
i have heard the cases hold and absorb moisture