Mix above and boil til flour is thoroughly scalded stirring constantly. Then knead w/ hands and it is ready for use. Use as if it were an eraser. Cleaner #2 Add enough water to the rye flour and ammoniac that it will form a dough, then use on soiled parts as if the mixture was a sponge. Turn soiled part of dough into itself and work out a clean part of the mixture. Never continue to rub the soiled surface of the cleaner into the wall. Cleaner #3 Cook while stirring. Knead into a smooth dough. Use pieces as though it were an eraser to clean wallpaper. Source:Handwritten notes glued into the Presidential Cookbook of 1909.