2. Add a little ammonia water with soap or use the mixture of linseed and turpentine with equal amount first, which will make the decontamination stronger and make the tiles shinier.
3. If the liquid with strong dyeability such as strong tea or ink is sprinkled on the brick, it shall be cleaned immediately.
4. Wax the polished brick regularly to achieve lasting protection. The time interval is 2-3 months.
5. If there are a few scratches on the brick surface, apply toothpaste on the scratches, and wipe the scratches with soft dry cloth.