Other than in the ice cube tray, there’s no ice growing inside my freezer. But whenever I keep sealed plastic packages/bags of frozen food in there for a few months, ice flakes start to form inside them, and over time more and more ice shows up.
There was no ice in these sealed packages when I first put them in my freezer. Most are factory-sealed. Like a little individually-packaged chicken sandwich or burger or whatever. Even frozen TV dinners in a plastic tray sealed under plastic wrap and also packaged inside a sealed cardboard box get ice growing in them after 6-8 weeks. An unopened, factory-sealed bag of frozen vegetables will turn to a big chunk of ice if I leave it in my freezer for a few months.
I can’t figure out where this ice comes from. Surely there’s no significant humidity in my freezer, and any humidity that gets in when I open the freezer door shouldn’t be able to get through the plastic into these sealed packages. Again, I don’t have any ice growing inside my freezer except inside all these sealed packages of frozen food. How does this happen, and is there anything i can do to stop it?