For this reason, you should always put a coin in your freezer

How Often Should You Check on the Coin?

Although the coin trick is designed to be passive, it is advisable to check its position after a trip or when strange power flickers are experienced. Checks ensure that the hack keeps on working and that, if food safety has been compromised, it will tell you.

If you’re in an area that loses power frequently, get in the habit of checking the coin every few weeks so you stay on top of things. Even if you rarely lose power, it’s a good idea to review the contents of the freezer every so often.