is hygroscopic, meaning it can attract and hold some moisture from its surroundings.
That’s the basic principle behind the trick.
But here’s the important part: ordinary table salt isn’t a powerful car dehumidifier.
So think of this as a small, low-cost experiment for mild moisture—not a replacement for proper ventilation, drying, or a dedicated moisture absorber.
Does a Glass of Salt Really Absorb Moisture?
Yes, salt can absorb moisture, but the effect depends heavily on the humidity and the type of salt.
Under sufficiently humid conditions, salt can take on
