You should avoid cleaning cement-based tile grout with harsh, highly acidic chemicals or abrasive tools that can erode the porous material and ruin the finish. Strong acids like undiluted vinegar, muriatic acid, or commercial cleaners containing harsh bleach can etch glazed tile surfaces, break down the chemical binder in cement grout, and cause rapid crumbling and discoloration. Additionally, avoid using stiff wire brushes, heavy metal scouring pads, or harsh abrasive powders that scratch ceramic surfaces and strip away protective sealers, leaving the grout even more vulnerable to dirt accumulation and staining over time.
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