... Instructions: The mosaic can keep bright through cleaning with little detergent by towel. When there is light scratch on the mosaic ... Pen, etc. Detergent(Soap, toothpaste, Diluted Laundry Detergent) Clean by cottony rags with detergent, and then clean with water. Oil ... , Toothpaste, Diluted Laundry Detergent. Clean by cottony rags with detergent, wipe the blot off by times, and then wipe-dry, finally ...