Soap scum on shower doors usually comes from hard water minerals, soap residue, body oil, and poor drying after daily shower use. USGS explains that calcium in hard water reacts with soap to form soap scum, which is why glass, tile, and metal surfaces can develop a cloudy or rough layer over time.
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2026-07-17
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2026-07-13Soap scum on glass shower doors usually comes from hard water minerals, soap residue, body oil, and poor drying after shower use. USGS explains that hard water reacts with soap to form soap scum, which is why glass panels, shower fittings, and tile surfaces may become cloudy or rough over time.