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  2. How to Clean a Shower Head (And Why You Really Need To) - AOL

    www.aol.com/lifestyle/clean-shower-head-why...

    After the hour has passed, remove the bag and scrub the faucet or shower head with a toothbrush to clear up any stubborn residue. Rinse by simply run the shower for a few minutes with hot water.

  3. Tympanosclerosis - Wikipedia

    en.wikipedia.org/wiki/Tympanosclerosis

    Whilst hearing loss is a common symptom in many diseases of the ear, for example in otosclerosis (abnormal bone growth in the ear), [3] the white, chalky patches on the tympanic membrane are fairly characteristic of tympanosclerosis. Cholesteatoma is similar in appearance but the whiteness is behind the tympanic membrane, rather than inside.

  4. Limescale - Wikipedia

    en.wikipedia.org/wiki/Limescale

    Limescale is a hard, chalky deposit, consisting mainly of calcium carbonate (CaCO 3). It often builds up inside kettles , boilers , and pipework, especially that for hot water. It is also often found as a similar deposit on the inner surfaces of old pipes and other surfaces where hard water has flowed.

  5. Tophus - Wikipedia

    en.wikipedia.org/wiki/Tophus

    Sometimes, tophi break through the skin and appear as white or yellowish-white, chalky nodules. Without treatment, tophi may develop on average about ten years after the onset of gout, although their first appearance can range from three to forty-two years.

  6. Whitewash - Wikipedia

    en.wikipedia.org/wiki/Whitewash

    Whitewash is sometimes coloured with earths to achieve colours spanning the range of broken white, cream, yellow and a range of browns. The blue laundry dye (such as Reckitt's "Dolly Blue" in the UK, Ireland and Australia, Loulaki in Greece, or Mrs. Stewart's Bluing in North America), formerly widely used to give a bright tinge to boiled white ...

  7. Wet storage stain - Wikipedia

    en.wikipedia.org/wiki/Wet_storage_stain

    Wet storage stain, more commonly known as white rust or white corrosion, is a type of zinc corrosion.It is called wet storage stain because it occurs when a fresh zinc surface is stored in a wet environment with limited oxygen and carbon dioxide sources; the restriction in air is usually due to the items being stacked on one another or otherwise stored in close quarters.

  8. Residue (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Residue_(chemistry)

    In chemistry, residue is whatever remains or acts as a contaminant after a given class of events. Residue may be the material remaining after a process of preparation, separation, or purification, such as distillation, evaporation, or filtration. It may also denote the undesired by-products of a chemical reaction.

  9. Soap scum - Wikipedia

    en.wikipedia.org/wiki/Soap_scum

    Soap scum or lime soap is the white solid composed of calcium stearate, magnesium stearate, and similar alkaline earth metal derivatives of fatty acids. These materials result from the addition of soap and other anionic surfactants to hard water.