š Why Some Drivers Put a Glass of Salt in Their Car
You may have seen the tip of leaving a glass or bowl of salt inside a car. The idea is that salt can help with moisture, but there’s an important catch: ordinary table salt is not a particularly effective car dehumidifier.
What is the idea behind it?
Salt can interact with moisture, and people sometimes recommend placing a small container of salt in the vehicle to help absorb humidity. The goal is usually to reduce:
Condensation on windows
A damp or musty smell
Excess moisture after rain or snow
Moisture trapped in floor mats or upholstery
However, salt doesn’t work like a dedicated moisture absorber. Calcium chloride products, commonly sold as moisture absorbers, are much more effective at pulling water from the air.
ā ļø Don’t put loose salt directly in your car
A container can spill while you’re driving. Saltwater can also be corrosive to some metals and electrical components.
If you’re dealing with persistent condensation, a better approach is to:
Remove wet mats and allow them to dry.
Check for water leaks around doors, windows, and the trunk.
Use the vehicle’s A/C and fresh-air/defrost setting to remove humidity.
Consider a purpose-made automotive moisture absorber.
Have the vehicle checked if the interior repeatedly becomes damp.
Bottom line: A glass of salt isn’t a magic car hack. If your goal is to keep the windshield clear and the cabin dry, controlling the source of moisture and using the car’s climate-control system is much more effective.
