How to deal with fogging in double-glazed glass without disassembly?
2 Answers
If you don't disassemble it, you can only use a hair dryer to dry and evaporate the water vapor inside. However, in rainy weather or in environments with high air humidity, fogging will still reappear and cannot be completely eliminated. The fogging problem in double-glazed glass is mainly caused by weakened sealing. The middle of double-glazed glass is vacuum-treated, and both sides are sealed with sealant. If the sealant ages or cracks, air can enter the interlayer. When the temperature rises, the moisture in the air turns into water vapor, forming tiny water droplets on the glass, which appears as fogging. How can this problem be completely solved? Fogging in double-glazed glass is generally caused by poor sealing performance. It is necessary to remove the sealant, clean it thoroughly, and then reapply new sealant. During installation, it is crucial to avoid any contact with water, as any moisture entering will cause fogging to occur.
I encountered this issue last year during summer after rain. The rear window fogged up, and the windshield interlayer was filled with moisture, making it dangerously hard to see the road. I quickly bought several packets of silica gel desiccants—those small granular dehumidifying packs—and placed them on the passenger seat to absorb moisture. I also tried using a household hairdryer to blow warm air along the window seams, being careful to use the low setting to avoid cracking the glass. The effect wasn’t permanent, but it provided temporary relief. Later, I consulted a mechanic friend who suggested that if the fogging isn’t severe, I could try using a vacuum cleaner to suck out some moisture from the edges. In the long run, it’s best to have a professional check the sealing to prevent recurring fogging. Driving safety comes first—don’t delay addressing the issue.
