Clogged drain ruining your morning? We review the best bath unblockers—from gels to tools—and share a pro trick before you call a plumber.

If you’ve tried a chemical gel, an enzymatic cleaner, and a snake, and the water still pools, stop. The blockage may be in the main stack or deep in the concrete slab. A plumber with an electric eel (auger) or camera is your next step.

It sits under your sink, a plastic bottle filled with what is essentially liquidized fire. We treat it as a mundane household tool, but the best bath unblocker is less of a cleaning product and more of a chemical demolition expert.