: Immediately cover the drain with a stopper or damp cloth to force the foaming reaction downward. Let it sit for 15 to 30 minutes (up to an hour for tough clogs).
However, there is a common misconception about how this remedy works. Many people believe the reaction itself eats away the clog. The truth is a little more nuanced, and understanding it is the key to actually fixing the problem. clearing blocked drains with bicarbonate of soda
Bicarbonate of soda (sodium bicarbonate) is a mild alkali. When combined with an acid (like vinegar or citric acid), it produces carbon dioxide gas, fizzing, and pressure. This helps dislodge soft blockages such as: : Immediately cover the drain with a stopper