A glass of salt inside a car might sound unusual, but some drivers use this simple household trick to help deal with excess moisture, foggy windows, and unpleasant smells. When warm, humid air meets cold windows, condensation forms, leaving the interior damp, especially during rainy or cold weather.

Salt can attract some moisture from the surrounding air, which is why people sometimes place a small container of it inside their vehicles. However, ordinary table salt has limited moisture-absorbing abilities and should not be considered a replacement for a proper car dehumidifier.

Why Do People Put Salt Inside Their Cars?

The main purpose is to help reduce humidity inside the vehicle. A small amount of salt may absorb some moisture, potentially helping with damp air and conditions that contribute to musty odors. As it absorbs moisture, the salt may become sticky, wet, or clumped together.

How to Try This Simple Trick

Place ordinary table salt or coarse salt in a small, sturdy container with an open top. Choose a wide container to expose more salt to the air, then position it somewhere stable inside the parked vehicle. Make sure it cannot tip over or interfere with driving. Check it every few days and replace the salt if it becomes noticeably damp.

Does It Actually Work?

Although salt can interact with moisture, its effectiveness is limited. It cannot dry soaked carpets, remove water trapped under floor mats, or stop leaks. Think of it as a small household experiment rather than a dependable solution for serious dampness.

Better Ways to Keep Your Car Dry

Remove wet clothes, umbrellas, and floor mats, and check door seals, windows, and the trunk for leaks. Using your car’s air conditioning and windshield defrost setting can also help remove moisture and clear foggy windows. Commercial moisture absorbers made with silica gel or calcium chloride are another option.

Never leave an unsecured glass container inside your vehicle, and avoid spilling salt on metal surfaces because it can contribute to corrosion. If dampness or musty smells keep returning, investigate the underlying problem rather than relying on salt alone.