Our oil film cleaning emulsion contains surfactants, diatomaceous earth. It keeps the glass clean for a long time. Its use method is very simple: clean the dust and debris on the surface of the glass, take an appropriate amount of this product poured on the cloth or sponge, wipe back and forth on the glass, and then rinse with water. And it can form a hydrophobic layer on the surface of the glass to keep the glass clean.