Cleaning Fire Residue from Glass and MetalWe salvaged some glass and metal antiques from our home after a fire, but not much left. It was a 75% loss. Hope to save some things, but what the heat didn't destroy, the smoke left behind this greasy black residue on everything. We have tried orange cleaners, oxi clean, windex, 409, but these type of cleaners hardly touch it. Any suggestions that might help dissolve this blackness?