My Cheese Melted while in the Fridge? I have a sandwich that says "sell by 11/4". The sandwich is white bread, provolone cheese, turkey breast, and some lettuce wrapped in a plastic bag.

I went to go eat the sandwich today and found that what appears to be the cheese has melted into a liquid goop. Within the sandwich the cheese was sitting on top of the turkey.

The provolone cheese says: pasteurized milk cheese culture, salt, enzymes.

I didn't know cheese could melt in the fridge?

No power was lost to the chilly bin since the turkey butty was put it in there.

Update:

So I pulled out my backup sandwich which is a little more recent in the aging period and it looks like the cheddar cheese is melting in this one too but not yet like the previous one's attempt to become school's next favorite Elmer's glue, although a little sour.

This ham butty has been in a different chilly bin so no connection to a power outage.

Is it the meat that's melting it, such as the salt in the meat, or something else?
My guess is that you don't have real cheese in your sandwich.

I've seen this before with things called cheese that were really types of American cheese. It happened when then product was exposed to moisture that it seemed to absorb, which then caused it to turn soggy and glue-like. If you'd have said that you had tomato in your sandwich, I'd have been sure this was what was going on.