Before we can talk about how to clean brass properly, there is one basic question: Is it really brass? Genuine brass is an alloy of copper and zinc. Since the zinc content varies, the color spectrum of brass is also very broad, which makes it difficult to identify it only by its appearance. The magnet trick is very handy to clear this matter up! Take a magnet and check whether the object in question is magnetic. If it is, it's probably a piece of iron rather than brass.
Typical brass objects include candlesticks, brass wind instruments, lamps, pots, chalices, and door handles. No matter what the object is, cleaning brass will be a piece of cake with these tips.