Silver Polish Illegal in Garbage & Drains Hazardous Waste Never Pour Down Drain Silver polish is toxic and even a small amount can affect waterways, so never pour it down the drain. Empty Containers Are Garbage If the container is empty, make sure any leftover residue is completely dry. Once empty and dry, it’s OK to put in the garbage. Ways to Reduce Use Safer Alternatives Instead of buying toxic silver polish, use materials you already have at home to clean your silver. Learn how from Better Homes & Gardens.