I place my loose NES games in sandwich bags to keep em clean. (I have a pellet stove to heat my house, and it spits a very fine powder/ash into the air)

I'm just wondering if the games will sweat in the bag (create condensation buildup). The baggies aren't sealed, but they are closed off enough to keep most particles out.

Has anyone heard of something like this happening?

The games won't sweat, but unless you're making sure to use bags with acid-free plastic, it could damage the labels (in the very, very long term).

The games are also in the standard dust covers inside of the bag, so the majority of the label is not in contact with the plastic. I would hope to hell that they are acid free, cuz I pack my lunch in the same bags!