To remove coffee stains from the inside of a glass coffee pot, add 4 teaspoons salt, 1 cup ice. Crushed ice works the best. And 1 tablespoon water. Gently swirl until clean, then rinse. Coffee pot should be at room temperature before cleaning
200+ STAIN FIXES from University of Illinois Extension ~ Stain Solutions... a comprehensive list of stain solutions. Each solution contains the supplies you will need and the preferred method for cleaning the stain.