Here is the science and the step-by-step method to unblock your sink using bicarbonate of soda and its essential partner, vinegar. On its own, bicarbonate of soda (a base) is a mild alkali that can dissolve some grease and dirt. However, its true power is unlocked when combined with a weak acid—specifically, distilled white vinegar.
Quickly cover the drain opening with a plug or a damp cloth. This traps the carbon dioxide gas inside the pipe, forcing it to push against the blockage rather than escaping upwards. Leave it for 15–30 minutes . sink unblocker bicarbonate soda
Pour ½ cup of dry bicarbonate of soda directly into the drain. Try to get it past the drain strainer and into the pipe. Here is the science and the step-by-step method