How to Stop Car Windows from Fogging Up


Dealing with foggy car windows during winter can be a real nuisance. We’ve all been there—just a few minutes into your drive, and suddenly visibility is compromised. It’s not only irritating but also poses a significant safety hazard on the road. Fortunately, there’s a simple and ingenious trick from Dave Hax that could make foggy windows a thing of the past. All you need are some old socks and a surprising ingredient: kitty litter. Here’s how you can put this clever solution into action.

Materials Needed:

  • An old sock
  • A roll of tape
  • Cat litter

Step-by-Step Instructions:

1. Choose a Suitable Sock: Select an old or single sock to use for this handy trick. A thick, absorbent sock works best, as it will hold more cat litter and provide better moisture absorption.

2. Prepare the Sock: Place the roll of tape at the top of the sock and roll the fabric down over it. This ensures that the sock remains open and ready for the next steps. This step makes it easier to fill the sock without spilling the cat litter.

3. Fill the Sock: With a clear opening now, start filling the sock with cat litter. Aim to fill it up to about the ankle level of the sock. Cat litter is designed to absorb moisture, making it an ideal material for this purpose.

4. Secure the Opening: Once the sock is filled, remove the roll of tape. Tuck the opening of the sock inside itself to keep it closed and secure the cat litter inside. Alternatively, you can tie a knot or use a zip tie for added security.

5. Place in the Car: Put the cat litter-filled sock in your car, and witness the magic as your foggy windows disappear. Place it on the dashboard, car seat, or even under a seat to keep it out of the way while still being effective.

How It Works

The brilliance behind this hack lies in the moisture-absorbing properties of cat litter, which is designed for use in litter boxes. In your car, it effectively pulls moisture from the air, preventing your windows from fogging up. This is particularly useful during the winter months when humidity levels can cause condensation to form on the cold glass surfaces of your windows.

While any brand of cat litter will suffice, using a fabric item like a sock is recommended, as it allows the litter to breathe and perform its job optimally. Socks, due to their shape and material, are particularly convenient for this purpose. They can be easily tucked away and moved around as needed.

Additional Tips

  • Double Up: For larger vehicles or extremely humid conditions, consider making two or more of these DIY moisture absorbers. This ensures maximum coverage and effectiveness.
  • Replace Periodically: Over time, the cat litter will reach its absorption capacity. Check the sock periodically and replace the cat litter as needed to maintain optimal performance.
  • Use Quality Cat Litter: While any cat litter can work, using a high-quality, highly absorbent brand will yield the best results.

Benefits of This Hack

This ingenious hack offers several benefits beyond just preventing foggy windows. It’s a cost-effective solution, utilizing items you likely already have at home. Additionally, it requires minimal effort to set up and maintain. By harnessing the moisture-absorbing power of cat litter, you can enjoy a clear view without the hassle.

Moreover, this method is environmentally friendly, as it repurposes old socks and utilizes a product that is readily available and often used in households with pets. It also avoids the need for chemical dehumidifiers, which can be more expensive and less eco-friendly.


In conclusion, this ingenious hack offers a cost-effective and practical solution to the age-old problem of foggy car windows. By harnessing the moisture-absorbing power of cat litter, you can enjoy a clear view without the hassle. So, why not give it a try and bid farewell to the annoyance of fogged-up windows? Your safer and clearer drives await!

Whether you’re dealing with daily commutes or longer journeys, this simple trick can significantly enhance your driving experience during the colder months. It’s a small effort for a big payoff in terms of safety and convenience. So, gather your materials and get started on this DIY project today—you’ll be glad you did every time you hit the road with clear, fog-free windows.

image source : little things