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Windshield Replacement

4 Reasons Your Windshield Fogs Up

Does your windshield begin to fog up just after a few minutes of driving? We’ve all been there! A foggy windshield can obscure your vision and lead to accidents. You can always get your windshield inspected by an auto repair expert to identify any underlying issues that might be causing your windscreen to fog up. Now let us look at some common reasons why windshields can fog up and what we can do to prevent it from distracting us while driving:

Temperature difference causing condensation

Condensation can obstruct and impede your vision on the road. This happens due to the temperature difference between the inside of the car and the external environment. When moist external air hits the cool windshield glass, it can cause moisture to appear on the glass. This usually occurs during the morning hours but can happen any time of the day. Also, temperature differences between the outside atmosphere and air inside the car can cause your windshield to get foggy as well. Using your wiper in this situation doesn’t help much. It just spreads the moisture, and the glass becomes foggier, blurring visibility.

High Humidity Levels

If humidity levels are high, it will cause moisture to stick to your windshield. This can often occur if there are many people inside the car. Their warm, humid breaths can also cause condensation, and there is a high risk of fog forming inside and outside the windshield surface.

Water Surface Tension

Water molecules can bond with external moisture when it hits your windshield. A chain of molecules will form to increase the surface tension and impede your vision through fogging. This type of fogging can be easily removed by activating your wipers and breaking the surface tension while driving.

Internal Heat

You would have noticed your windshield fogging up when it gets warm inside your car. This is because heat carries more moisture. Warm air molecules have more space between them that lets water molecules fit in. This causes condensation to occur inside your car.

Tips to prevent fogging

  1. Try stopping air circulation during colder conditions. Letting cold air inside your car will cause more condensation.
  2. Neutralize the air temperature in your car if it’s cold outside and very warm inside the car. You can crack a window to remove the fogging.
  3. Sometimes using a wiper can break the surface tension and fix the fogging. If it does not help, stop your car in a safe spot and wipe it externally to dry the moisture before driving.
Driving with a foggy windscreen can be highly dangerous as it impedes vision. If you’re not sure what’s wrong, call a professional who can help you out. Your safety and satisfaction are our top priority at AAG Auto Repairs. We have been offering windshield repairs, windshield replacement, and auto glass repairs in Houston for more than three decades. Give us a call to get a quote or estimate.  

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