This tip actually has real science behind it—just without the exaggerated hype. A glass (or container) of salt in your car can help with moisture and fog, especially in cold or rainy weather.
🚗 Why Putting Salt in Your Car Works
Salt is hygroscopic
That means it absorbs moisture from the air. When humidity builds up inside a car (from rain, snow, wet shoes, or breath), salt can help reduce excess moisture.
✅ What It Helps With
1. Foggy Windows
- Moist air condenses on cold glass → fog
- Salt absorbs some of that moisture, helping reduce fog buildup
2. Damp Smells
- Moisture causes musty odors
- Lower humidity = fewer smells
3. Light Interior Dampness
- Helpful in winter or rainy seasons
- Can reduce condensation overnight
❌ What It Does NOT Do
- It won’t fix a broken heater, AC, or defroster
- It won’t remove heavy water leaks
- It won’t instantly clear fog while driving
Think of it as a support trick, not a replacement for car systems.
🧂 How to Do It Safely
Best Method
- Fill a small breathable container (sock, mesh bag, coffee filter, or fabric pouch) with coarse salt (rock salt or table salt)
- Tie or seal it securely
- Place it:
- Under a seat
- In a cup holder
- On the dashboard (secured so it won’t spill)
🔁 Replace every 2–4 weeks, or when the salt feels damp or clumpy
⚠️ Safety Tips (Important)
- Do NOT leave an open glass that can tip over
- Salt can damage upholstery or metal if spilled
- Keep it out of reach of pets
🧠 Extra Tip
Silica gel packs (like the ones in shoe boxes) work even better and are designed for moisture control—but salt is a cheap, easy backup.
Bottom Line
✔️ Yes, salt can help reduce moisture and fog
✔️ It’s based on real science
❌ It’s not a miracle fix
If you want, I can also share:
- A DIY reusable moisture absorber
- Best tricks to prevent fog while driving
- Or how to spot a car moisture leak early
Just tell me 🚘
