hard water grout stains 4

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Over time, hard water leaves stubborn mineral deposits in the grout lines of your tiles, turning them a crusty white or yellowish hue that simple scrubbing won't budge. The stains feel rough and gritty, a buildup of calcium and magnesium that clings deep in the porous cement. You might notice them most around shower walls or kitchen backsplashes where water splashes regularly. They develop gradually, often going unnoticed until the grout loses its original color and a cloudy residue becomes har…