The Claim
Some sources suggest that keeping a glass or container of salt in your car can help:
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Absorb moisture – Salt is hygroscopic, meaning it attracts water.
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Reduce humidity inside the car – Potentially preventing foggy windows or musty odors.
How It Works
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Salt naturally pulls moisture from the air.
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In a small, enclosed space like a car, it can slightly lower humidity, which may help:
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Windows fog up less during cold or rainy weather.
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Minor damp smells in carpets or upholstery may be reduced.
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Important Considerations
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Use a sealed container
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Open salt could spill and damage car upholstery or electronics.
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Consider a small breathable pouch or perforated container.
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Effect is limited
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A single glass won’t dry out a large car cabin entirely.
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Salt is better for localized moisture control (e.g., glove compartment, under the seat).
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Alternative methods
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Silica gel packs or specialized car dehumidifiers are safer and more effective.
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Regularly airing out the car and using floor mats that dry quickly also helps.
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Bottom Line
Putting a glass of salt in your car can slightly reduce moisture, but it’s not a miracle solution. It’s safe if contained properly, but for real effectiveness, modern dehumidifiers or moisture-absorbing packs are usually better.
If you want, I can give a step-by-step setup for the safest and most effective moisture-control hack using salt or alternatives—it’s surprisingly easy and prevents foggy windows in winter.
Do you want me to do that?
