Boil 2 cups of water and pour it slowly down the drain. This softens soap scum and grease.
Pour 1/2 cup vinegar down the drain immediately after the baking soda. It will fizz and bubble vigorously. how to unclog shower drain with vinegar and baking soda
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. Boil 2 cups of water and pour it slowly down the drain
Pour 1/2 cup baking soda directly into the drain. Try to get it as far down as possible (a funnel helps). how to unclog shower drain with vinegar and baking soda