Black Smoke/Soot On Gutter
I have an issue that I can't seem to resolve. Over the years of gas grilling inside our covered patio, smoke from the cooking has stained the outside wall and gutter black. I have tried 50/50 bleach mix(nada), straight bleach(nada again). Granted, I have not left the solutions sit on the stain overnight, but it don't seem like it will com off. I have not scrubbed it, just sprayed on with a spayer. Any thoughts or idea's would be greatly appreciated.