Because the silver plated should be an anti-oxidation treated surface before leaving the factory, the surface layer will be worn once after rubbing, so the speed of discoloration will indeed become faster and faster. Let me tell you a method that you can experiment with. After polishing the candle holder, apply a thin layer of transparent nail polish on the entire surface. This cuts off the contact between silver and air and makes the candle holder not easy to change color. For example, after trying this method, jewelry will not change color for up to a year when worn.