How to Keep Windows from Fogging Up

When you’re driving in cold weather, one of the most common issues that drivers encounter is a foggy windshield. This can be frustrating and dangerous, as your visibility can become significantly impaired. However, there are several steps you can take to prevent your windows from fogging up. In this article, we’ll go through twelve different methods for keeping your windows clear and your driving safe. From adjusting your climate control to using household items, we’ll cover a variety of techniques that can be useful in different situations.

Step-by-Step Guide: How to Keep Windows from Fogging Up

1. Use Your Climate Control Wisely

The easiest way to prevent your windows from fogging up is to use your car’s climate control system properly. Typically, you’ll want to set your defrost setting to “high,” which directs hot air toward the windshield. Additionally, use your air conditioning system to help remove excess moisture from the air. This can help prevent fog from forming on the glass.

2. Adjust Your Air Vents

In addition to using your climate control system, you can also adjust your air vents to help direct hot air towards the windshield and other windows. By making sure the vents are open and pointed towards the glass, you can help reduce the amount of moisture that accumulates on the surface.

3. Avoid Bringing Excess Moisture into Your Car

One of the main causes of foggy windows is excess moisture inside your car. This can come from breathing, wet clothing, or other sources. To prevent this, try to avoid bringing wet items into the car, and make sure you’re not breathing directly onto the windows.

4. Use a Defogger Product

There are a variety of sprays and wipes available that are specifically designed to prevent foggy windows. These products work by leaving a thin layer of film on the glass, which helps prevent moisture from accumulating. Make sure you choose a high-quality product and apply it properly according to the instructions.

5. Keep Your Windows Clean

Dirty windows can exacerbate the problem of foggy glass, as dirt and grime can trap moisture in place. To prevent this, make sure you clean your windows regularly using a high-quality glass cleaner. This can help ensure that the surface is smooth and free of obstructions.

6. Install Rain Guards

Rain guards, also known as wind deflectors, can help prevent moisture from building up on your car’s windows. These are typically simple plastic devices that attach to the exterior of your car and redirect airflow away from the windows. This can be especially helpful during rainy weather.

7. Use a Hair Dryer

If you’re in a pinch and don’t have access to other solutions, a hair dryer can be a quick fix for foggy windows. Simply turn the dryer on low heat and direct the airflow towards the glass. Be careful not to overheat the glass or use the dryer for too long, as this can cause damage.

8. Crack a Window

Leaving a small crack in one of your windows can help improve airflow and prevent moisture buildup. This can be especially helpful during rainy or humid weather conditions. Additionally, if you can park your car in a location where there is plenty of air movement, this can also help prevent foggy windows.

9. Use a Homemade Solution

If you prefer to use more natural solutions, there are several homemade remedies that can help prevent foggy windows. For example, you can create a mixture of water and vinegar and apply it to the glass using a soft cloth. This can help remove any buildup that may be contributing to the problem.

10. Use Cat Litter

This may sound strange, but cat litter can actually be useful for preventing foggy windows. Simply place a small bag of cat litter on your dashboard or near the floor of your car. The litter will absorb excess moisture in the air and help keep your windows clear.

11. Use Shaving Cream

Another unusual solution, shaving cream can be used to prevent foggy windows. Apply a small amount of shaving cream to the inside of the windshield and wipe it away with a clean cloth. The thin layer of residual cream can help reduce moisture buildup.

12. Use a Rain-Repellent Product

Finally, you can use a product designed to repel rain and moisture from your windshield. These products typically come in spray form, and work by creating a hydrophobic barrier on the glass. Rain and moisture will simply slide off the surface, helping to prevent fog and other visibility issues.

Tips and Tricks for Preventing Foggy Windows

1. Raise the Temperature

If your windows are already fogged up, try raising the temperature inside your car. This can help evaporate the moisture and clear up the glass.

2. Turn on Your Seat Warmer

Many newer cars now come with seat warmers, which can help prevent moisture from building up on your clothes and the interior of your car.

3. Use a Microfiber Cloth

When cleaning your windows, use a high-quality microfiber cloth to avoid leaving streaks and residue that can trap moisture.

4. Park in a Covered Area

If possible, park your car in a covered area to help prevent moisture buildup and exposure to the elements.

5. Replace Your Air Filters

Dirty or clogged air filters can contribute to excess moisture in your car’s air supply. Make sure to replace your filters regularly to keep your car’s interior dry.

6. Invest in Anti-Fogging Products

There are many products available that are designed specifically to prevent foggy windows. Consider investing in one of these products for long-term prevention.

7. Avoid Humid Environments

If you live in a particularly humid area, consider investing in a dehumidifier or other moisture-reducing solution to keep your car dry.

8. Use a Sun Shade

During hot weather, use a sun shade to keep your car’s interior cool and prevent humidity and moisture buildup.

9. Keep Your Car Well-Ventilated

Make sure to open your windows periodically to allow fresh air to circulate through your car, especially after driving with wet clothing or in rainy weather.

10. Be Patient

Finally, remember that sometimes the best solution for preventing foggy windows is simply to be patient and wait for the moisture to evaporate on its own. In many cases, the problem will resolve itself naturally with time.

By following these twelve steps and tips, you can keep your car’s windows clear and your driving safe. Remember to adjust your climate control settings, keep your windows clean, and use anti-fogging products as needed.

Advantages and Disadvantages of How to Keep Windows from Fogging Up


1. Better visibility: Keeping windows from fogging up can significantly improve visibility while driving or operating machinery, which can prevent accidents and keep you safe.

2. Prevents moisture damage: Fogging can cause moisture to build up on surfaces, leading to eventual damage or decay. By keeping windows from fogging up, you can prevent this from happening.

3. Improves air quality: Fogged-up windows can trap odors and pollutants inside your vehicle or home, leading to poor air quality. By preventing fogging, you can improve the air quality around you.

4. Saves time: Having to constantly wipe down fogged-up windows can be a time-consuming task. By preventing fogging, you can save time and be more productive.

5. Cost-effective: There are many DIY methods and products available to prevent windows from fogging up, making it a cost-effective solution.

6. Enhances appearance: Fogged-up windows can give a dirty or unkempt appearance, while clear windows can enhance the look and feel of your home or vehicle.

7. Long-lasting: Many of the methods and products used to prevent fogging can last for months, meaning you don’t have to constantly reapply or maintain them.

8. Reduces stress: Clear windows can reduce stress levels, as fogged-up windows can be frustrating and distracting.

9. Safe for all surfaces: Most methods and products used to prevent fogging are safe for all types of surfaces, including glass, plastic, and metal.

10. Environmentally friendly: Many DIY methods for preventing fogging use natural and environmentally friendly ingredients, making them a sustainable solution.


1. Limited effectiveness: Some methods and products used to prevent fogging may not be effective in all situations or climates, and may require frequent reapplication.

2. Chemical exposure: Some commercial products used to prevent fogging may contain harsh chemicals that can be harmful if not used properly.

3. Product cost: While many methods for preventing fogging are cost-effective, some commercial products may be more expensive and require ongoing purchases.

4. Requires maintenance: Some DIY methods for preventing fogging may require ongoing maintenance or adjustments to continue working effectively.

5. May affect aesthetics: Some methods for preventing fogging may leave a residue or film on surfaces that could affect the appearance or aesthetics of the area.

6. Limited application: Some methods for preventing fogging may only be effective on specific surfaces, and may not work on all types of glass or plastics.

7. Temperature dependence: Some methods for preventing fogging may only work effectively within certain temperature ranges, and may not be effective in extreme temperatures.

8. Time-consuming application: Some DIY methods for preventing fogging may require more time and effort to apply than commercial products.

9. May not prevent condensation: While methods for preventing fogging can be effective, they may not always prevent condensation on surfaces, which can still reduce visibility.

10. May require trial and error: Finding the best method for preventing fogging may require some trial and error, which can be frustrating and time-consuming.


Q: Why do windows fog up?

A: Windows fog up when there’s a difference between the outside and inside temperature. When warm, moist air comes in contact with a cool surface, it condenses into water droplets, causing the window to fog up.

Q: How can I prevent windows from fogging up?

A: You can prevent windows from fogging up by keeping the indoor humidity level low, ventilating your home, and using a dehumidifier. You can also apply an anti-fog solution to the glass surface to prevent moisture from gathering.

Q: What is an anti-fog solution?

A: An anti-fog solution is a product that prevents or reduces fogging on glass surfaces. It works by creating a thin layer that repels moisture and keeps the glass surface clear and visible.

Q: How do I apply an anti-fog solution?

A: To apply an anti-fog solution, clean the glass surface thoroughly and let it dry completely. Then, apply the solution using a clean cloth or a spray bottle, and wipe off the excess. Repeat the process regularly for best results.

Q: Can I make my own anti-fog solution?

A: Yes, you can make your own anti-fog solution using household items such as vinegar, baby shampoo, or dish soap. Mix them with water in a spray bottle and apply to the glass surface. However, the effectiveness of homemade solutions may vary.

Q: How often should I apply the anti-fog solution?

A: How often you should apply the anti-fog solution depends on the product and the usage. Some products require daily application, while others may last for weeks or even months. Check the instructions on the label for best results.

Q: Can I use anti-fog solutions on car windows and mirrors?

A: Yes, you can use anti-fog solutions on car windows and mirrors to prevent fogging. However, make sure the product is safe for use on glass and won’t damage your car’s surface.

Q: Can I prevent windows from fogging up by using a hairdryer?

A: Yes, you can use a hairdryer to prevent windows from fogging up temporarily. Blow hot air on the glass surface until it’s clear and dry. However, this method is not recommended for long-term use as it can damage the window or increase indoor humidity.

Q: How can I reduce indoor humidity?

A: You can reduce indoor humidity by properly ventilating your home, using exhaust fans in kitchens and bathrooms, and fixing leaks or moisture problems. You can also use a dehumidifier to remove excess moisture from the air.

Q: What is the ideal humidity level for a home?

A: The ideal humidity level for a home is between 30% and 50%. Maintaining this range can prevent mold growth, reduce allergens, and improve indoor air quality. Use a hygrometer to monitor the indoor humidity level.

Q: Can I use baking soda to absorb moisture?

A: Yes, you can use baking soda to absorb moisture. Place a container filled with baking soda in areas prone to moisture, such as drawers, closets, or bathrooms. Replace the baking soda every few months for best results.

Q: Can plants help reduce indoor humidity?

A: Yes, plants can help reduce indoor humidity by absorbing moisture through their leaves and releasing it into the air. Plants such as Peace Lily, Boston Fern, and Spider Plant are known for their air-purifying and dehumidifying properties.

Q: What should I do if my windows are still fogging up despite my efforts?

A: If your windows are still fogging up despite your efforts, it may be a sign of a bigger problem, such as poor insulation, air leaks, or high indoor humidity. Consult a professional to identify and solve the issue.

How to Keep Windows from Fogging Up

Foggy windows can be a serious pain, not to mention a hazard while driving. Condensation forms on the windows when warm or moist air meets the cold glass surface, obstructing your vision and making it difficult to drive safely. However, there are some easy solutions you can implement to help prevent windows from fogging up.


The solutions mentioned above may seem like minor adjustments to your daily routine, but they can go a long way in preventing foggy windows. Sometimes, it can be a combination of a few methods that will work best for your particular situation. Try them out to find what works best for you, and enjoy clear, unobstructed windows despite the weather outside.


By following these simple tips on how to keep windows from fogging up, you can prevent accidents, increase visibility while driving, and make your daily commute a much safer and enjoyable experience. Thank you for taking the time to read this article, and always drive safely!