The reason why the glass inside the car freezes is that there is still hot air in the car after leaving the car the night before, which makes the temperature of the glass inside the car higher than that outside the car. If the temperature outside is too low or it snows, the snow will melt first when it falls on the glass. In the process of snow melting, when the temperature inside the car gradually decreases to the same temperature as that outside the car, the melted snow water on the glass begins to freeze, and the snow falling after freezing will not melt again. Cover the ice sheet like a quilt, and the water in the car glass will solidify into ice beads, which will frost and adhere to the glass. There is frost on the glass in the car.