Q: The drain in one shower in our home keeps plugging up. We put baking soda and vinegar down the drain and water flows better, but in about a month, the drain is plugged up again. What should we do?

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 ...