How a Simple Cup of Salt Can Improve Your Car’s Comfort—and Your Health
Ever stepped into your vehicle only to be greeted by steamed-up windows and a damp, musty odor? You’re not alone. These annoyances—particularly common in older cars—can turn an ordinary trip into something downright unpleasant. But the fix isn’t high-tech or expensive. In fact, you probably have it in your kitchen cupboard right now.
That’s right—plain salt.
Salt has a natural ability to attract and hold moisture, thanks to its hygroscopic nature. This makes it an effective, low-cost way to reduce humidity inside your vehicle. Simply placing a container of salt in your car can help keep condensation off the windows and create a drier, more breathable atmosphere.
Excess moisture is the root cause of that moldy smell that air fresheners only cover up. Salt, on the other hand, goes after the source—absorbing the dampness that leads to mildew. For those with allergies or sensitive airways, especially older adults, a less humid cabin can mean easier breathing and better overall comfort.
Using this trick couldn’t be easier: just pour some dry salt—whether it’s table salt, rock salt, or sea salt—into a small bowl or container and set it on your dashboard or tuck it beneath a seat. When the salt starts to clump, it’s time to replace it. Compared to options like silica gel or charcoal, salt is clean, cheap, and always within reach.
Older vehicles are more vulnerable to moisture problems due to worn-out seals and being left parked for longer stretches. This can result in foggy windows, musty odors, and even interior mold. Salt helps combat all of these issues by soaking up the extra humidity.
Drivers across the country, like Betty in North Carolina and Don in Michigan, swear by this trick. They’ve noticed clearer windows, fresher air, and a more enjoyable drive—all thanks to a simple cup of salt.
Want to test it out for yourself? Try it once—and your car (and your lungs) might just thank you.