I have about 20 or so vintage AFA pieces that are still in their unremoved poly bags that AFA ships them back in. Should I leave them in the poly bags or do they need to breathe to stay in good shape longterm. I don't want to do anything detrimental that erodes their condition by leaving them in the bags. All my AFA pieces are stored in an air conditioned cooled climate inside my house. Just thought I'd ask to see what everyone around here suggests. Thanks in advance for any help regarding this matter.