For minor organic slime and soap scum blockages, you can pour a mixture of hot water combined with liquid dish soap or a specialized biological enzyme drain cleaner down the bathtub drain to dissolve greasy residue. For stubborn mineral crusts, white vinegar can help. However, because the vast majority of bathtub clogs consist of dense human hairballs, pouring liquids is generally ineffective, and mechanical removal is required. Verification: Run warm water down the tub to test drainage speed after flushing.
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