The Way Everything Works on Instagram: "Putting toothpaste in the toilet before flushing works because of simple chemistry and water movement. Toothpaste contains mild abrasives and cleaning agents designed to break down stains and fight bacteria, and when it’s added to the bowl, the force of the flush spreads those ingredients across the surface. The abrasives help loosen light residue, while antibacterial compounds reduce odor-causing germs, and the mint oils leave behind a fresh scent. The sw