For a sluggish drain caused by organic slime and grease, you can pour a mixture of hot water combined with liquid dish soap, a biological enzyme drain cleaner, or a cup of baking soda followed by white vinegar down the pipe to dissolve greasy buildup. For mineral-related sluggishness, warm white vinegar helps dissolve calcium crust. However, for stubborn hair blockages, pouring liquids is ineffective, and you must use a physical drain snake or plastic hair-removal tool. Verification: Test drainage flow immediately after flushing the line with hot water.
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