Condensation is the process of gas (water vapor) transitioning into a liquid. This can occur when water vapor in air transitions into liquid water, or when solid ice melts and becomes liquid water. When talking about car windows, we almost always assume it is caused by water vapor turning to liquid (condensation).
Condensation will occur on any surface cooler than the dew point temperature of the surrounding air. This means if you have warm moist air inside your car and cool dry air outside your car, condensation will form on the cool surface of the glass and evaporate as soon as it hits warmer surrounding air.
How can I stop it? The easiest way to fix this problem is to improve the ventilation of your car. This means you need a way for the moist air inside the car to escape as it begins to transition from vapor into liquid water.
If you have a sunroof open slightly, crack a window, or open up any other path for fresh air to enter your vehicle, this will help dry out the air and greatly reduce condensation on your windows. If these options do not work for some reason, a small electric dehumidifier can be used in the car overnight to help prevent this from happening again.
Also, find a possible source of liquid in the car as it may be the main source of condensation on your windows.
About the authors
The CarAraC research team is composed of seasoned auto mechanics and automotive industry professionals, including individuals with advanced degrees and certifications in their field. Our team members boast prestigious credentials, reflecting their extensive knowledge and skills. These qualifications include: IMI: Institute of the Motor Industry, ASE-Certified Master Automobile Technicians; Coventry University, Graduate of MA in Automotive Journalism; Politecnico di Torino, Italy, MS Automotive Engineering; Ss. Cyril and Methodius University in Skopje, Mechanical University in Skopje; TOC Automotive College; DHA Suffa University, Department of Mechanical Engineering
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