How Homeowners Can Tell if Grout Discoloration Is Reversible

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To figure out if grout discoloration is reversible, start by scrubbing a small test area with a mild cleaner and a stiff brush. If the color lightens and matches the original tone, it's likely just surface dirt or mildew. Stubborn stains that remain unchanged after thorough cleaning usually mean the grout has absorbed the discoloration deep inside, which often requires regrouting or professional restoration.