Start by removing any visible hair near the drain entrance using gloves or tweezers.
Pour the baking soda down the drain.
Follow immediately with the white vinegar. You'll likely see fizzing and bubbling, which is normal and indicates a chemical reaction that helps break down the clog.
Cover the drain with a plug or cloth to keep the fizzing action contained within the drain.
Let the mixture sit for about 30 minutes to an hour.
After the waiting period, flush the drain with hot water. The hot water will help wash away the broken-down clog and residue.
Remember that while this remedy works for many minor clogs, severe clogs may require professional intervention. Also, it's important to avoid using this method if you've recently used a commercial drain cleaner, as the combination of different chemicals can be dangerous. If the clog persists or worsens, it's best to consult a professional plumber.