Long before safety labels, home cleaning was a high-stakes experiment in "whatever works." From scrubbing floors with abrasive sand to dusting with flammable kerosene, our grandparents relied on gritty, often dangerous methods to maintain a spotless home. Whether it was erasing soot with bread dough or breathing in caustic ammonia fumes, these nine relic habits prove that keeping a house tidy once required serious and sometimes toxic bravery.