Working in a freezer?

You say that your feet are wet due to perspiration. That means your feet are sweating. Cold does not make you sweat. Heat makes you sweat. The freezer has nothing to do with your problem - according to what you have shared with us so far. Your feet are sweating because you are moving around a good bit, and your body is not able to cool itself by just air flow alone. Why is that? Do you wear heavy clothes all the time? Do you keep them on when you leave the freezer? Are you out of the freezer more than you are in? Do you wear a cap or hat? If the answers to some of these questions is "yes" then try this: Do not wear thermal underwear shirts under your work shirt. Wear a coat or vest in the freezer instead. As soon as you leave the freezer, take your cap and gloves off. As quickly as convenient, remove your coat or vest. Anytime you feel yourself starting to sweat, even if you are inside the freezer, take your cap off and unzip your jacket. Take the jacket off if you have to to stop sweating. These steps might decrease your foot perspiration.

As others have said, the problem might be made worse by having shoes or socks that absorb perspiration rather than allowing it to pass out into the air. Some guys' feet sweat even before the rest of their body does, so having moisture-wicking socks and shoes would be vital for them, to keep the sweat from growing bacteria inside their footwear. Once it gets started, it will stay and stinkify any fresh socks you put on, so you will probably need to start with NEW shoes.

You need to switch to socks that have good wicking properties, meaning they move the moisture out from your skin rather than trapping it as traditional heavy wool socks do.

try wearing wool socks. They absorb moisture while keeping your feet from actually freezing. Then change shoes and socks a couple times a day. {You may need 4 pair of shoes to always have dry shoes to put on.}

Wear wool socks and shoes that breathe. The more air circulation the better. Try non insulated boots like a hiking boot that has canvas or fabric instead of leather or rubber

wear extra clothes and buy a shoe that is resistant to the cold