If you’ve ever opened your car door to foggy windows or a stale, damp smell, you’re not alone—this is especially common in older vehicles. Moisture tends to build up over time, making the interior feel uncomfortable and allowing unpleasant odors to stick around. The good news is that a simple solution is likely already in your kitchen.
Regular table salt can be surprisingly effective at absorbing excess moisture inside your car. Since salt naturally pulls water from the air, placing a small amount in your vehicle helps reduce humidity, limit window fogging, and keep musty smells at bay. It’s an easy, natural, and very affordable fix.
To use this trick, pour dry salt into a small bowl, jar, or even a sock, and place it under a seat, in a cup holder, or on the dashboard. As it absorbs moisture, the salt will begin to clump—signaling that it’s time to replace it. There’s no need for special equipment or chemicals.
By keeping moisture under control, you also lower the chance of mold and mildew forming, which are often responsible for lingering odors and can irritate allergies. This method works especially well for cars that sit unused, are parked outdoors, or have aging seals. Sometimes, the simplest household items can make the biggest difference in keeping your car fresh and comfortable.