1 Car Rear-View Mirror Electric Heating
The heating wire works, then the heating of the mirror face Accelerate water volatilization. It usually works for the light rain, but likely fail for heavy rain
2 Spraying Water Repellent
The surface of the glass is coated with a hydrophobic layer, which turns the mist into small drops of water, which are gathered into large drops of water until they fall off. It usually works for the heavy rain, but likely fail for light rain
3 Lotus Leaf Principle Film
The hydrophobic base is inlaid on the surface of the film, turning the mist into small drops of water, which are gathered into large drops of water until they fall off.t usually works for the heavy rain, but likely fail for light rain
4 PET Anti Rain/Fog Film
Based on hydrophilicity, quickly dissolve all water molecules into a piece of water, and water parallel to the film. It works for both light rain and heavy rain.
Comparing the 4 method with relative showing pictures, there is no doubt, PET Anti Rain/Fog Film is the best chose for your car rear-view mirror when driving in the rainy or foggy day.
video link: https://www.bilibili.com/video/BV1K64y1c7Qt/