One summer, the back corner of my fridge started giving off a strange, musty smell that just wouldn't quit. I emptied every shelf. I scrubbed everything down with vinegar water. Nothing worked.
Then my grandmother stopped by, and half-joking, half-serious, she gave me a tip I almost laughed off: put a small bowl of salt in there and forget about it. I tried it anyway — I had nothing to lose. It turned out to be one of the simplest kitchen fixes I've ever come across.
Why salt actually works
The moisture-absorbing power of salt has been a household secret for generations. People use it to dry out damp shoes and keep musty cupboards fresh — and the same trick works beautifully inside the fridge.
Salt helps lock away excess humidity, which builds up more easily in the warmer months. That's when we open the fridge door more often and the outside air is hotter. And that trapped moisture is one of the main reasons a fridge starts to smell stale and holds onto food odors.
How to do it at home
The method takes almost no effort, but a few small details make the difference between it working and doing nothing at all.
- Grab a small open-topped bowl or glass that holds a few tablespoons of coarse salt.
- Place it in the back corner of the fridge, somewhere out of the way, where a shelf won't press into it and the crisper drawer won't knock it over.
- Leave it there and check on it about once a month to see if it's clumped up from the moisture.
- If the salt looks wet or has hardened into a lump, swap it for fresh salt — at that point it can't absorb humidity effectively anymore.
When to replace it
In the summer months you'll want to check the bowl more often, since there's more moisture in the air and your fridge is working harder. If the salt starts looking almost runny, or no longer feels crumbly, it's time to change it.
I usually put in a fresh batch about every three weeks, though that depends on how packed your fridge is and how often you open the door. If you're doing a bigger reset, it pairs nicely with a proper deep clean of the fridge.
Where else the salt trick works
Once I saw how well it worked in the fridge, I started trying it in other spots around the house.
A little bowl of salt in the corner of the pantry helps fight musty smells too, and it earns its keep in the shoe cabinet whenever the weather turns damp.
The principle is always the same: put it somewhere enclosed and poorly ventilated, where moisture would naturally settle in.
I'm not saying this replaces regular cleaning or a good airing-out of the fridge — but as a backup, it works brilliantly. Since I started this little habit, I reach for deodorizing sprays and heavy-duty cleaners far less often, and the inside of my fridge simply smells fresher when I open it in the morning.
What kind of salt should I use in the fridge?
Coarse-grained salt works best, since a few tablespoons in an open bowl are enough. The larger grains absorb the excess moisture that leads to stale odors.
How often do I need to replace the salt?
Check it roughly once a month, and more often in summer. If it turns wet, runny or clumped, swap it for fresh salt — usually every three weeks or so, depending on how full your fridge is and how often you open it.
Does the salt trick replace cleaning the fridge?
No. It's a helpful backup, not a substitute for regular cleaning and airing out the fridge. Used together, though, you'll likely reach for sprays and strong cleaners far less often.
Where else can I use a bowl of salt?
Anywhere enclosed and poorly ventilated where moisture tends to settle — like the corner of a pantry or a shoe cabinet during damp weather. The idea is always the same as in the fridge.
