"soap scum" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "soap scum (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1999, Jeff Bredenberg, Clean It Fast, Clean It Right, page 349",
          "text": "You can purchase one of the numerous cleaners on the market specifically formulated to dissolve soap scum or use a variety of home remedies for ridding tile, showers and bathtubs from the dull gray film.",
          "type": "quotation"
        },
        {
          "ref": "2007, Ellen Sandbeck, Organic Housekeeping",
          "text": "Clean soap scum off a tub or shower stall by applying hot vinegar with a sponge or rag, then scrubbing hard with a stiff-bristled scrub brush.",
          "type": "quotation"
        },
        {
          "ref": "2008, Uri Zoller, Handbook of Detergents, Part E: Applications, page 96",
          "text": "Bars made of real soap (sodium salts of fatty acids) are still very popular products for showering and whole body bathing, however, and using these products will produce soap scum. It is interesting to speculate on whether soap scum becomes less of a problem as use of shower gels continues to increase.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The buildup of insoluble calcium or magnesium fatty acids from the use of soap with hard water, which leads to a dulling of surfaces and acts as a matrix for trapping soils."
      ],
      "id": "en-soap_scum-en-noun-EyX3s3tM",
      "links": [
        [
          "buildup",
          "buildup"
        ],
        [
          "insoluble",
          "insoluble"
        ],
        [
          "calcium",
          "calcium"
        ],
        [
          "magnesium",
          "magnesium"
        ],
        [
          "fatty acid",
          "fatty acid"
        ],
        [
          "soap",
          "soap"
        ],
        [
          "hard water",
          "hard water"
        ],
        [
          "matrix",
          "matrix"
        ]
      ],
      "tags": [
        "uncountable"
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "word": "Kalkseife"
        }
      ],
      "wikipedia": [
        "soap scum"
      ]
    }
  ],
  "word": "soap scum"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "soap scum (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Translation table header lacks gloss"
      ],
      "examples": [
        {
          "ref": "1999, Jeff Bredenberg, Clean It Fast, Clean It Right, page 349",
          "text": "You can purchase one of the numerous cleaners on the market specifically formulated to dissolve soap scum or use a variety of home remedies for ridding tile, showers and bathtubs from the dull gray film.",
          "type": "quotation"
        },
        {
          "ref": "2007, Ellen Sandbeck, Organic Housekeeping",
          "text": "Clean soap scum off a tub or shower stall by applying hot vinegar with a sponge or rag, then scrubbing hard with a stiff-bristled scrub brush.",
          "type": "quotation"
        },
        {
          "ref": "2008, Uri Zoller, Handbook of Detergents, Part E: Applications, page 96",
          "text": "Bars made of real soap (sodium salts of fatty acids) are still very popular products for showering and whole body bathing, however, and using these products will produce soap scum. It is interesting to speculate on whether soap scum becomes less of a problem as use of shower gels continues to increase.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The buildup of insoluble calcium or magnesium fatty acids from the use of soap with hard water, which leads to a dulling of surfaces and acts as a matrix for trapping soils."
      ],
      "links": [
        [
          "buildup",
          "buildup"
        ],
        [
          "insoluble",
          "insoluble"
        ],
        [
          "calcium",
          "calcium"
        ],
        [
          "magnesium",
          "magnesium"
        ],
        [
          "fatty acid",
          "fatty acid"
        ],
        [
          "soap",
          "soap"
        ],
        [
          "hard water",
          "hard water"
        ],
        [
          "matrix",
          "matrix"
        ]
      ],
      "tags": [
        "uncountable"
      ],
      "wikipedia": [
        "soap scum"
      ]
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "word": "Kalkseife"
    }
  ],
  "word": "soap scum"
}