🧂 Put a Glass of Salt in Your Car? Here’s What It Actually Does
You’ve probably seen this viral car hack claiming that placing a glass of salt inside your vehicle can solve common problems. There is a little science behind the idea, but ordinary table salt is not a particularly effective moisture absorber.
4 things drivers should know
Salt absorbs some moisture under certain conditions, but ordinary table salt is not very effective at controlling humidity inside a car. For foggy windows, use the vehicle’s defroster and air conditioning instead.
Not reliably. Salt does not neutralize most odours. If your car smells musty, check for wet carpets, damp upholstery, clogged drainage channels, or water leaks.
A purpose-made automotive moisture absorber or suitable silica-gel desiccant is generally a better option. Follow its instructions and keep it secured away from pedals and airbags.
It is better not to leave a loose glass container in your vehicle. It can spill or become a dangerous projectile during sudden braking. Salt residue can also encourage corrosion when it contacts metal and moisture.
The better way to stop windshield fogging
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Turn on the front windshield defroster.
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Switch on the A/C if available, even in cool weather, to help dehumidify the air.
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Select fresh outside air rather than recirculation.
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Dry wet floor mats and investigate persistent dampness.
The verdict: A glass of salt is not a miracle car hack. For moisture control, a proper desiccant and a dry, well-ventilated interior are more reliable.
