There are a few things you can do to clean silver with coke. First, pour a small amount of coke into a small bowl and add enough water to cover the silver. Stir until the coke is mixed in. Next, use a cloth or paper towel to wet the silver and then place it on the coke-soaked cloth or paper towel. Use gentle pressure to scrub the silver clean. Finally, dry the silver with a dry cloth or paper towel.