when stains appear on ceramic tiles, never scrape them with metal tools, or wipe them with grinding wheel or sand. Otherwise, the surface of ceramic tiles will be damaged and become rough, or even scratch. Do not brush them with hydrochloric acid or sulfuric acid solution, because this kind of solution will corrode the cement and cause the tiles to loosen.
the correct way to remove the stains on ceramic brocade tiles is to adopt different methods according to different stains. If it is limewater stains, can be watered wet with a brown brush wipe off, and then used to wipe cloth; Food residual juice and oil can be washed with warm soapy water, and then cleaned with clean water; The hard mark of cement slurry shall be removed by talc grinding.