Thinking your antibacterial soap is doing a good job of keeping you healthy by killing germs? Think again. According to a recent study by Tufts University, triclosan -- the active ingredient in antibacterial products --actually breaks down when exposed to chlorinated water. Most public water, which is what most people use, unless they have their own well, has levels of chlorine in it, which means your antibacterial soap is worthless. The best option for clean hands is regular old soap and hot water.