We all do it. You open up a can of something that a recipe calls for and you only use a half of it. You don’t want to waste it, so you stick a piece if plastic wrap or aluminum foil over the top of it and stick it in the fridge and tell yourself you’ll use it soon. Nine times out of ten it ends up in the trash when you decide to clean your refrigerator out a few weeks down the road. In most cases, items like that should be tossed a lot sooner than that because many of them present hidden dangers that you may have never learned about. Chances are pretty good that some of these items are in your fridge right now and should be tossed out.
1. Open Tins
Tins have been used for decades to pack food with the idea of making it easy to transport and last longer. Once you open a tin, however, all bets are off. You really should just make use of the contents or toss them in the trash. The problem with letting food sit in opened tins in your fridge is that the metal that the tin is made from can leech into the contents. This is particularly true if the can contains things with a high acid content like tomato sauce. At the very least, remove the contents from tins and place them in some other kind of container (glass is preferred) before storing them in your refrigerator.