You seal an envelope and then instantly regret it. Maybe your check, important letter, or private message is trapped inside, and the envelope feels like a tiny paper prison.
Surprisingly, there is an old trick that may help reopen it without completely destroying the envelope. It does not always work, but it can sometimes give you a second chance.
The freezer method works best on traditional lick-and-stick envelopes that use water-based glue. Cold temperatures can make the adhesive become brittle and slightly loosen its grip.