How do you remove black soot and smoke residue from a marble fireplace?

How do you remove black soot and smoke residue from a marble fireplace?:





I have bought a marble fireplace from sams club and when I use it a black residue appeared at the top. I have used many cleaners and solvents but they have not worked. How do I remove this hideous black spot from my fireplace?|||anything i find that i cant get off, especially on a smooth surface, i use Mr. Clean magic eraser on. Haven't been disappointed yet.|||Warm water and 409. Let dry, then use Windex same as you would on a window.