We recreate a real-life drain disaster - hair, shampoo and a stubborn U-bend - then see which unblockers get things flowing again. We also test... We note if an unblocker pours easily, leaves behind a ...

Q. We get an intermittent bad odor, like sewer gas, from our shower drain. The drain flows freely and if we pour bleach into it the odor goes away for a while, but it always comes back. The house is ...