Check the Freshness of Your Eggs
According to Food Microbiology, salt is a potent antibacterial and antiseptic. Salt can be used in incredible ways on things like food, clothes, and kitchen appliances. You can start your salt hack journey by using it to check the freshness of those eggs that have been sitting on your fridge shelf for an unknown amount of time.
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Salt raises water’s density enough to make bad eggs float. When eggs rot, they release gas pockets into their shells, and it makes them less dense than saltwater. If they’re fresh, eggs should sink in saltwater.
So what you need to do is dissolve two tablespoons of salt into two cups of water. Drop the egg into the solution. If it sinks, it’s safe to eat. If it floats, go to the supermarket and buy yourself a fresh carton of eggs.