How to Keep Car Windows from Fogging Up: Expert Tips and Tricks

Keeping car windows from fogging up is a common problem faced by car owners, especially during the rainy season. This can be a major inconvenience and a safety hazard, as it can affect visibility while driving. Fortunately, there are several effective ways to prevent car windows from fogging up, both on the inside and outside of the car.

Effective Ways to Keep Car Windows from Fogging Up

Inside the Car

1. Use a commercial anti-fogging product. Anti-fog sprays and wipes can be found in most auto supply stores and are easy to use. Simply spray or wipe the product onto the inside of your car windows and then wipe it off with a clean cloth. This will prevent fog from forming on the glass.

2. Keep the car well-ventilated. Turn on the air conditioning or heater when necessary to help prevent moisture buildup in the car. If you notice that the windows are starting to fog up, turn the defroster on to help clear the fogged area.

3. Avoid moisture buildup. This means avoiding activities inside the car that can cause humidity to build up, such as leaving wet clothes or umbrellas inside the car or eating hot and steamy food.

4. Use silica gel packs. Silica gel absorbs moisture and can help keep the interior of your car dry. Simply place a few silica gel packs in a breathable sachet around your car to keep the moisture levels under control.

5. Keep the glass clean and dry. Clean the inside of your car windows regularly with a microfiber cloth and glass cleaner to remove any dirt or dust that can trap moisture, which leads to fogging up.

6. Avoid smoking inside the car. Smoking can create significant amounts of moisture and smoke residue on the car windows, which can cause fogging up.

Outside the Car

7. Keep the windshield clean. Dirt and grime on the outside of the windshield can condense with the moisture inside the car and cause fogging up. Regularly clean the windshield with a good windshield cleaner to avoid this problem.

8. Apply shaving cream to the windshield. This may sound strange, but applying a thin layer of shaving cream to the outside of your windshield and then wiping it off with a clean cloth can make the windshield fog-resistant.

9. Use a defogging spray. Similar to anti-fogging products, defogging sprays can be applied to the outside of your car windows to prevent fogging up. These sprays contain hydrophilic agents that help repel moisture and prevent fog from forming on the glass.

10. Apply a hydrophobic coating. Hydrophobic coatings can repel water and moisture, preventing them from accumulating on the outside of the car windows. These coatings are easy to apply and can be found in most auto supply stores.

11. Park the car in a dry location. If possible, park the car in a covered area that is away from sources of moisture, such as ponds or puddles. This will help prevent moisture from accumulating on the outside of the car windows.

12. Use windshield wipers. If all else fails and your car windows fog up, use your windshield wipers to clear the area. This will help improve visibility while driving.

Tips and Tricks for Preventing Car Windows from Fogging Up

1. Use a microfiber cloth

Microfiber cloths are great for cleaning car windows because they are absorbent and won’t leave any streaks or lint behind. They are also reusable and easy to wash.

2. Avoid parking near trees

Trees release moisture into the air through a process called transpiration, which can cause moisture to accumulate on your car’s windows and increase the likelihood of fogging up.

3. Keep the windows cracked

Cracking the windows open a bit can help improve air circulation and prevent moisture buildup in the car.

4. Use a moisture absorber

Products like Damp Rid and Moso Natural Air Purifying Bags can be placed in the car to absorb excess moisture and prevent fogging up.

5. Wax the windows

Waxing the outside of your car windows creates a hydrophobic barrier that repels moisture and prevents it from accumulating on the glass.

6. Keep a squeegee in the car

A squeegee can be used to quickly remove moisture from the car windows and prevent fogging up. Keep one in the car at all times.

7. Invest in a dehumidifier

If you live in a particularly humid climate, a dehumidifier can be a worthwhile investment. It will help keep the air in your car dry and prevent moisture buildup.

8. Use rain repellent glass treatment

Products like Rain-X can help repel water and moisture, preventing it from accumulating on your car windows and causing fogging up.

9. Use baking soda

Sprinkling a little baking soda on the carpet and upholstery in the car can help absorb moisture and prevent fogging up. Just be sure to vacuum it up after a few days.

10. Avoid using recirculated air

Using recirculated air can cause humidity levels to increase inside the car, which can lead to fogging up. Instead, use fresh air from outside the car to improve air circulation.

In conclusion, fogged up car windows can be a major inconvenience, but with these tips and tricks, you can easily prevent and control this problem. By keeping the interior and exterior of your car clean and dry, avoiding sources of moisture, and using anti-fogging and defogging products, you can ensure clear visibility while driving in any weather condition.

Advantages and Disadvantages of Keeping Car Windows from Fogging Up


1. Improved Visibility: One of the biggest advantages of keeping your car windows from fogging up is improved visibility. When your windows are free of fog, you can see the road clearly and avoid any potential accidents.

2. Enhanced Safety: Foggy windows can cause hazardous conditions while driving, especially during winters. By keeping your windows clear, you can avoid skidding, and other accidents, which can ensure safety on the road.

3. Comfortable Indoor Environment: Foggy windows can also make the inside of your car feel damp and cold. By keeping them clear, you can maintain a comfortable and dry indoor environment for your passengers and yourself.

4. Cost-effective Solution: There are various simple and cost-effective ways to prevent your car windows from fogging up. For example, you can use a simple solution of vinegar and water to clean your car windows, which is far cheaper than buying expensive car window cleaning products.

5. Preserves the Integrity of the Glass: Frequent exposure to fog, moisture, and temperature fluctuations can damage the glass on your car windows, leading to cracks and chipping. By keeping your car windows from fogging up, you can ensure that your car’s windows stay intact and free from damage.


1. Extra Effort and Time: Keeping your car windows from fogging up can take a considerable amount of time and effort. You may need to clean them frequently, especially during harsh weather conditions, which can be time-consuming.

2. Need for Consistency: To prevent your car windows from fogging up, you need to maintain consistency in cleaning, which can be a tedious task. It can also be challenging to form good habits of cleaning your car windows regularly.

3. Health Risks: Some fog-preventing options, such as using chemicals, can pose health risks. For example, some window cleaning solutions contain harsh chemicals that can be harmful to your health if inhaled excessively.

4. Limited Effectiveness: While there are many simple solutions available, some may not be as effective as others. For example, DIY solutions may only work temporarily, and you may have to repeat the process frequently to keep your car windows from fogging up.

5. Economic Loss: If your car windows are frequently fogged up, it can decrease its resale value. Therefore, it is crucial to keep your car windows free of fog to maintain its economic value.


1. Why do car windows fog up?

Car windows fog up due to differences in temperature between the inside and outside of the car and the humidity inside the car.

2. What can I do to prevent my car windows from fogging up?

You can prevent your car windows from fogging up by keeping the inside of your car dry, using your car’s defrost system, cracking a window, and using anti-fog products.

3. How can I keep the inside of my car dry?

You can keep the inside of your car dry by using a dehumidifier or moisture-absorbing products, like kitty litter or silica gel packets.

4. Can I use my car’s air conditioning to prevent window fogging?

Yes, using your car’s air conditioning helps remove moisture from the air and can prevent window fogging.

5. Should I wipe the inside of my car windows with a cloth?

Wiping the inside of your car windows with a cloth can temporarily remove fog, but it can also spread oils and residues that contribute to fogging. It’s best to use anti-fog products instead.

6. How does cracking a window prevent window fogging?

Cracking a window allows for air circulation and helps balance the temperature and humidity inside the car.

7. What are some anti-fog products I can use?

There are many anti-fog products available, including sprays, wipes, and films that can be applied to your car windows.

8. Can I use a hair dryer to remove fog from my car windows?

While using a hair dryer can quickly remove fog, it also blows moisture around and can cause streaks and damage to your car’s interior.

9. Should I keep my car windows open while driving to prevent fogging?

No, keeping your car windows open while driving can increase air resistance and decrease fuel efficiency.

10. Can I use vinegar to prevent window fogging?

Yes, a mixture of vinegar and water can be applied to your car windows to prevent fogging.

11. What is the best way to apply anti-fog products?

Follow the instructions on the anti-fog product packaging for best results. Usually, the product is sprayed or wiped onto the surface of the window and then wiped dry.

12. How long do anti-fog products last?

The duration of effectiveness for anti-fog products varies. Some products can last for several days, while others need to be reapplied after each use.

13. Should I avoid using my car’s recirculation mode to prevent window fogging?

No, using your car’s recirculation mode can help prevent window fogging by limiting the amount of moisture entering the car.

Have you ever experienced having your car windows fogged up in the middle of a trip? It can be a frustrating experience, especially if you are in a rush or in a hurry to go somewhere. Foggy car windows not only impair your vision while driving but can also be a potential safety hazard. Therefore, it is essential to learn how to prevent your car windows from fogging up.

How to Keep Car Windows from Fogging Up

Firstly, make sure that your car’s interior is free from moisture. One way to do this is to avoid bringing wet items such as umbrellas or raincoats in the car. You can also use a moisture absorber, such as silica gel or a dehumidifier, to remove excess moisture from the air inside your car. These can be purchased at specialty stores or online, and can be placed in your car overnight to help keep the windows dry.

Another way to prevent your car windows from fogging up is to turn on the defroster. The defroster works by blowing warm and dry air onto the car’s windows, which helps remove any mist or fog on the glass. You can also set your air conditioning system to the “fresh air” mode, which will help circulate the air inside the car and prevent it from becoming too humid.

If you still experience foggy car windows, you can also use special cleaning agents that are designed to help prevent moisture buildup. These agents can be applied to the inside of the windows, and they work by creating a thin film that resists moisture. Be sure to follow the instructions carefully when using these products, as some may require particular application techniques or times.

Finally, make it a habit of cleaning your car windows regularly. Dust, dirt, and other debris that accumulates on the windows can trap moisture and make your windows more susceptible to fogging up. Use a microfiber cloth or a special window cleaner to wipe away any dirt or grime from your car’s windows.


Preventing your car windows from fogging up is not just a matter of convenience, but also a matter of safety. By following these simple tips, you can help ensure that you have a clear view of the road ahead, and avoid any potential accidents caused by impaired vision. Remember to keep your car’s interior dry, use the defroster when necessary, apply special cleaning agents, and clean your windows regularly to keep them clear and free from fog.

Closing: Thank you for reading, and we hope that these tips will help you keep your car windows from fogging up. Safe travels!