You can remove years of stains from copper knobs with simple ingredients, some people can revive anything in their homes, but they feel in the dark when faced with a specific material. Want to learn how to clean copper? Then read on! Have you ever wondered, “Does copper tarnish?” If so, then you probably didn’t own anything brass! This building material, made of copper and zinc, may be beautiful, durable, and resistant to corrosion, but it does eventually wear off, according to Popular Mechanics, and luckily, when that happens, there is a solution, and here’s how to clean brass: Put 3/4 cup of lemon juice In a bowl, add half a cup of baking soda, mix them well and dip the brass pieces, and after about 30 minutes, rub each piece with a piece of scrubbing sponge until it becomes shiny. And that’s all there is to it! You can save this under the heading “We practice what we preach.” I used this recipe to clean stained copper cabinet handles, and it worked beautifully, let us know how it goes with you in the comments below!