Sterling silver jewelry should not be exposed to alcohol for a long time. Alcohol will oxidize the surface of silver and produce black oxide, which will make silver ornaments black. If you want to clean sterling silver jewelry, you can use a special silver jewelry cleaner or gently wipe it with mild soapy water. If the silver jewelry has turned black, you can use a special polishing cloth for silver jewelry or go to a professional jewelry store to clean and polish it.