Pour 1/2 cup baking soda directly into the drain. Try to get it as far down as possible (a funnel helps).
Here’s a step-by-step guide to unclog a shower drain using vinegar and baking soda. This method works best for minor clogs caused by hair, soap scum, and mild buildup. how to unclog shower drain with vinegar and baking soda
Boil 2 cups of water and pour it slowly down the drain. This softens soap scum and grease. Pour 1/2 cup baking soda directly into the drain
Boil another 2 cups of water and pour it down the drain. Then run hot tap water for 1–2 minutes to clear any residue. Repeat if necessary — For persistent clogs, repeat the process once more. repeat the process once more.