a piece of soap, a little detergent, the car’s rearview mirror is not foggy


It’s raining on weekends, and the foggy rearview mirrors can be very uncomfortable for motorists. Today we will introduce a simple and easy to use rearview mirror to remove rain, just prepare a piece of soap or a little detergent.

Soap Method:

Wipe the glass first to avoid scratching the glass with dirt and sand.

Dip the soap slightly with water to make the soap softer. Then apply the soap evenly over the entire surface of the glass, wait for the soap on the glass to dry, and turn it into a powder. Finally, use a paper towel or newspaper to remove the soap. Be careful not to use a towel. It is easy to leave fines with a towel. After cleaning the glass, a small amount of soap will remain on the glass. Some places outside the car will be slightly blurred from the inside of the car, but it will not affect the overall view.

I experimented on the bathroom glass at home last night. After drying it, I sprayed water on the glass. I found that the mirror treated with soap did not form water drops, but it was a uniform to apply soap. The technology is alive, because I didn’t apply it evenly, I left a layer of water on the glass (the water was not smeared).

Dishwashing Method:

After-sales personnel at the 4S shop introduced a method to remove rainwater with detergent. Find an empty gel water bottle, fill the water and detergent with a ratio of 9:1. Spray it on the front bump and the two side curtains before driving, in the rainy days or when it is easy to fog. Wipe clean with a soft tissue to ensure that the car glass will not fog again in a few days.

The chemistry teacher explained the principle of this method:

The soap molecular structure can be divided into two parts. One end is a COO- (hydrophilic moiety) with a charge polarity, and the other end is a non-polar carbon chain (lipophilic site).

Soap can destroy the surface tension of water. When the soap molecules enter the water, the polar hydrophilic part will destroy the attraction between the water molecules and reduce the surface tension of the water, so that the water molecules are evenly distributed on the treated glass surface and adhered in the form of a water film. On the glass, the more rainwater is hit on the glass, the larger the water film is formed, so that the glass always maintains good clarity.

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