If you have a brick fireplace, here's a safe and simple cleaner for you! Mix a healthy teaspoon of dishwasher powder with a liter of warm water. Scrub the brick with the solution and a stiff-bristled brush. The soot stains will scrub right off. If you use your fireplace like I do, it is very important to keep up with the cleaning. Ignoring the fireplace will simply make cleaning that much more difficult.