For minor soap scum and organic buildup, you can pour a mixture of hot water combined with liquid dish soap or a biological enzyme drain cleaner down the shower drain to break down greasy sludge. For stubborn hair clogs, however, pouring liquids is rarely effective; instead, you should use a mechanical drain snake, a wet/dry shop vacuum, or a manual plunger to physically extract the blockage. Verification: Test drainage speed by running the shower tap immediately after flushing the line.
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