Method 1: You can buy K-gold cloth to wipe the watch in the after-sales service center, commonly known as K-gold cloth or magic cloth to wipe it yourself. Method 2: Wipe off the oxidized and discolored part with a pure eraser (don't use an eraser containing glass fiber, it is easy to scratch). Method 3: Use a traditional face-lifting material (Hsinchu convex powder), take a soft toothbrush with a little convex powder, and lightly brush the discolored and scratched watchband (shell), and the effect will be satisfactory. Method 4: Dip a soft toothbrush in bath milk or detergent and lightly brush the eye seam of the watch, rinse it with clear water, wipe it with a clean flannel, and then blow dry it with a hair dryer, with a distance of 10 cm. Toothpaste is not suitable for cleaning, and the smooth surface will be foggy because toothpaste contains fluoride and lime. Method 5: Jewelry Watch ~ In addition to paying attention to whether the gemstone is loose, users can also use a toothbrush to dip a little salad to clean the dirty part of the gemstone, or soak it in a special potion for jewelry, and then rinse it with clear water to have the original bright appearance and add luster.