Slowly pour the boiling water directly into the drain to soften and loosen grease, soap scum, and debris.
Remove the cover. Boil another 2–4 cups of water (or run the hottest tap water for 1–2 minutes) and flush the drain thoroughly. unclog drain with baking soda
Bring 2–4 cups of water to a rolling boil. Slowly pour the boiling water directly into the
Pour 1/2 cup of baking soda directly into the drain. Use a spoon or your finger to push any dry baking soda that sticks to the sides down the opening. unclog drain with baking soda
Quickly cover the drain opening with a plug or a damp cloth. This traps the expanding foam inside, forcing the reaction deeper into the pipe rather than letting it bubble back up.