What are the steps for defogging a car in winter?
3 Answers
Winter vehicle glass fogging occurs due to the significant temperature difference between the interior and exterior in the current environment. Solutions for fogging on the outside of the windshield include the following: 1. Open the windows to allow air convection: When outside air forms a convection current, the temperature difference decreases, and the fog will dissipate. This method does not increase fuel consumption. 2. Use the air conditioner to defog: You can press the front windshield defogging button on the central control panel, then adjust the air vents to direct airflow toward the front windshield. This method can achieve almost instant defogging. 3. Use a defogging spray: Evenly spray the defogging solution onto a soft cloth, then wipe the front windshield with the cloth. Alternatively, you can spray the defogging solution directly and evenly onto the windshield.
When the windshield fogs up in winter, I always handle it this way: First, start the vehicle and let it warm up for a few minutes until the engine heats up and the water temperature rises. Then turn on the heater. Adjust the air direction to blow only toward the front windshield and switch to the external circulation mode to let outside air in for ventilation. At the same time, remember to activate the dehumidification function of the air conditioning by pressing the AC button, which helps remove moisture from the car and speeds up fog dissipation. Once the fog clears significantly, I turn off the AC and reduce the fan speed to avoid excessive noise. If the fog is heavy and slow to clear, slightly opening a window for temporary ventilation or wiping the glass dry can also help. Before getting in the car in winter, I brush off any snow on my body to reduce moisture input. These steps are crucial for ensuring clear visibility and safe driving. Making it a habit brings more peace of mind during travel.
My family car is mainly used for picking up and dropping off the kids at school, and defogging in winter is crucial for the safety of the whole family. I usually start the engine and wait for a minute or two to let it warm up before turning on the heater directly toward the windshield. Turning on the external air circulation is a must, as the air inside circulates too slowly otherwise, making it hard to clear the fog. The AC dehumidification button must be pressed—although it blows warm air, the AC function significantly helps with moisture removal. Once the fog clears, I reduce the fan speed. I’ve also found that regularly cleaning the oily film on the glass surface helps prevent fogging, and I always keep a dry cloth in the car for quick wipes. Avoid eating in the car when getting in, as it creates moisture. Patience throughout the process is key—don’t rush to drive off to avoid blurred vision. Safety comes first, so prioritize proper operation.
