The viral claim that keeping a glass of salt in your car is a life-saving hack is completely false and lacks scientific backing.
Salt in a cup holder cannot absorb enough moisture to defog windows, and open salt actually attracts humidity, creating a corrosive mess inside your vehicle.
Road salt and loose table salt promote rust and corrosion on car components, making salt an enemy of vehicle maintenance rather than a helpful tool.
For genuine cabin moisture control, odor removal, or emergency traction, use silica gel dehumidifiers, baking soda, or sand instead of salt.
