- 1). Allow the drain to dry out as much as possible. Leave it without running water for 24 hours, if possible.
- 2). Pour 1/2 cup of baking soda down the drain.
- 3). Pour 1 cup of vinegar slowly down the drain. Let the mixture sit for 15 to 30 minutes.
- 4). Boil at least a quart of water in a pot.
- 5). Pour the quart of boiling water down the drain.
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