Buy this: Lemon Juice
Not that: Brass and copper cleaner
Savings: about $6-10
Why? Going green will save you money and give you peace of mind. Clean copper and solid brass the natural way: Cut a lemon in half and sprinkle some salt on it. Rub the lemon on the piece you’re polishing (don’t worry, the salt won’t scratch the metal). Rinse the item thoroughly and dry.