We've seen a lot of things will be put into a mold, the glass is also one of the glass mold is due to poor storage environment, the temperature is too large or some other causes. In the light will see some mildew, watermarks, grease, etc., seriously affect the appearance of the glass, the glass will lose moldy after original luster, reduce transparency, if large quantities of glass mold, will give a great deal of glass loss, glass mold in the process are: the beginning is water or moisture adsorbed on the surface of the glass, and the water to the inside of the glass diffusion, after a long time, the water will follow the glass material within the chemical reaction, the resulting material will on the glass surface formation of spots. So how do the glass mold can be cleaned with hydrofluoric acid solution ratio of 1:50 after the glass surface rinse with water, citric acid cleaned glass surface after 1:50 rinse. Glass mold is generally with the environment, storage, transportation and other factors, so do not store for long.