To naturally clear a slow drain without using harsh chemical cleaners, remove the drain stopper and use a plastic zip-it tool or wire hair snake to pull out trapped hair clogs from the P-trap. Next, pour a cup of baking soda down the drain followed by two cups of warm white vinegar. Let the natural fizzing action break down soap scum for 30 minutes, then flush the pipe thoroughly with hot tap water. Verification: Pour a full bucket of water down the drain to confirm that it empties rapidly without pooling.
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