Which Button to Press for Foggy Rearview Mirrors?
3 Answers
For fog inside the car, press the front window defogger button. Here are methods to defog windows: 1. Open windows for air circulation: If the fog inside is not heavy, slightly open both side windows to allow air exchange between inside and outside, reducing temperature difference and gradually dissipating the fog. 2. Use the air conditioning system: Simply select the appropriate AC setting to direct airflow for defogging. Turn on the car's fan and cooling switch; cold air directed at the front windshield will quickly remove fog, with immediate effect. 3. Anti-fog spray: Purchase anti-fog spray from the market, apply it to the inner surface of car windows, and wipe clean. This not only removes dirt but also forms a protective film to prevent moisture condensation and fog formation on the glass, with one application lasting about ten days.
I often encounter the issue of foggy rearview mirrors, having driven for over a decade. The button is usually the rear window defroster, marked with an icon resembling three wavy lines, found on the dashboard or air conditioning control panel. Press it after starting the car, and the fog will dissipate in two to three minutes. The main cause is the temperature difference between the inside and outside of the car, causing moisture to form on the mirror glass. If there's no response, check the fuse or wiring, but never wipe it manually while driving—it's unsafe. For vehicles with automatic air conditioning, pressing the AUTO button might handle defogging automatically. A safety tip: preheating the car before starting in winter can reduce fogging. My experience is that the button works well, but older cars might occasionally malfunction and require a shop inspection.
I just bought a car and was quite anxious when the rearview mirror fogged up. Which button should I press? I checked the manual, and the button is on the air conditioning panel, marked with a defogging symbol, such as a fan or wave icon. Pressing it activates the rearview mirror heating, and the fog clears quickly. Driving to and from work on rainy days makes fogging common; the button is convenient, but beginners should remember not to confuse it with the front window defogging button. If you can't find it, turning on the AUTO mode of the air conditioning also works. As a preventive measure, wiping the mirrors after parking can avoid the problem. Safety first—if fog obstructs your view, pull over before handling it.
