ability to interact with moisture. It may help absorb a small amount of humidity, but it is not a substitute for proper ventilation, a functioning air-conditioning system, or repairs when water is getting inside the vehicle.
If you decide to try it, use a secure container and check the salt regularly. For persistent dampness or foggy windows, focus on removing wet items, checking for leaks, and using your car’s defrost system.
Sometimes a simple household trick is worth understanding, but knowing its limitations is just as important as knowing how
