Pouring coarse salt down a drain is a traditional home maintenance practice used to help scour away light grease films and eliminate minor organic odors. When combined with baking soda and vinegar or flushed with hot water, abrasive salt crystals provide mild mechanical scrubbing action along the interior walls of the P-trap. While it offers no power against severe clogs or dense hairballs, it acts as a safe, natural refresher for kitchen sink drains between deep cleanings. Verification: Flush the drain thoroughly with hot tap water after treatment to wash away dissolved salt.
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