Hi everyone. Lots of the mortar, and some bricks, around the woodstove are very dirty looking and wife would like me to clean them - not sure what to use, or if it's really possible. The darkening from before I bought the house about 1.5 years ago, so not sure what caused it to begin with. Any advice greatly appreciated! P.S. Looks like NH is going to miss the northeast snowstorm AGAIN - what a weird year - only about 2 inches here in the last 4 weeks!