The weather is complicated and changeable recently, and it is often encountered in heavy rain or cold weather. It is easy to get a layer of fog on the window. Even if it is wiped over and over, it is still impossible to take it. This is not an experienced old The driver is really difficult to deal with. When driving in more severe weather, the air outside the car is colder than the inside of the car. This temperature difference between cold and hot inside and outside, plus the humidity inside the car, the windshield begins to fog. Many novices wipe the fogged glass while driving because their eyes are blocked. This is very unsafe and dangerous.

Generally speaking, the correct approach is to use the air conditioner to defog-turn on the air conditioning refrigeration and external circulation, and reduce the internal and external temperature difference. However, under the temperature of autumn, sometimes it feels cold to turn on the air conditioner. If it does not turn on, the windshield will fog again, and you can't see the front line of sight. What should I do? Today I will share with you a few "defog" methods:

1. The fastest and fastest method: air conditioning cold wind

When it is found that there is fog on the windshield, the fastest and fastest way is to first adjust the air outlet of the air conditioner to the front windshield, turn on the air conditioning cooling function, plus the external circulation, the maximum air volume only takes about ten seconds In time, you can quickly blow away the mist on the glass.

2. The most radical method: air conditioning hot air or heating

If you need to keep the car completely without fog, then you should choose to turn on the air conditioner and choose hot air to blow the windshield. In the same way, first use the external circulation, select the air conditioning hot air and the front windshield exit, wait for about 5 minutes, and then choose to switch to the internal circulation, or directly turn off. Of course, with air-conditioning heating function, the defogging effect will be faster and better. The principle is to use warm air to dry the water vapor molecules in front of the windshield and circulate outside the car to prevent it from condensing on the glass to form water droplets. This method is relatively slow in defogging, but the effect in rain and snow is indeed the best, and it is also the most fundamental cure. When the humidity in the car is reduced and the air is dry, it can be kept for a long time without fog formation at the window. It is also more suitable for cold autumn, at least the car will be very warm and pleasant. The only disadvantage is that this method is not suitable for driving on the road, because the early warm air will increase the temperature difference in front of the windshield, resulting in the entire glass being covered with fog. Only after waiting patiently to dry it completely, the window is transparent and clear To continue driving.

3. The most economical method: window convection or skylight

Open the window or increase the air convection, reduce the temperature difference between the inside and outside of the car, and weaken the fog formation conditions. This method is the most economical method. It does not need to open the air conditioner to increase fuel consumption. However, this method is also the most problematic. The first one is rain and snow. It is very unsuitable. Second, the wind effect is very slow. It takes at least 5 minutes or more to be effective, and the effect is not obvious. The key is still very cold!

4. High-tech method: defogging agent

The savvy businessmen have long discovered this common demand for cars, so they have developed a variety of defogging agents, with prices ranging from 10-200 yuan. There are many brands, styles and types. When using it, you only need to spray it evenly on the glass surface, and then wipe it clean with a dry towel to play the anti-fog effect. The principle is to use a surfactant method to retain a certain protective film on the glass surface, change the surface tension of the water molecules, and cause the fog beads to condense into large water beads, so as not to obstruct the line of sight. The magical use of this kind of thing is that it can be used in the rearview mirror, which can quickly condense and drain the rain.

5. The most popular method: anti-fog towel

Of course, there is a special tool on the Internet, that is, anti-fog towels, which cost between 9.9-50 yuan. When it is foggy, wipe it with this towel and you will find that it is no longer foggy. The principle behind this magic towel is also very simple. In fact, the anti-fogging agent is soaked in the towel, and the effect is exactly the same as that of the defogging agent.

6. The cheapest method: detergent

In fact, if you do n’t want to spend money on tools for defogging, or want to use air conditioners to increase fuel consumption, then the most economical way is to redeem the defogging stuff yourself. The production of this thing is very simple. In fact, it is to mix household detergent and tap water in a ratio of 1: 6-10, then spray it evenly on the glass, and then gently wipe it with a towel. The principle, effect and demisting There is no difference!

The above are just a few big tricks for everyone. You can choose according to your driving habits and specific situations. But don't wipe it with a rag or paper while driving. Not only does it have no effect, but it is easy to wipe off the glass, and the fog will form repeatedly, and it is easy to cause traffic accidents if you are not careful.