To repair grout, start by cleaning the surrounding tile and using a grout saw to remove any loose or crumbling material. Vacuum the area thoroughly to ensure no debris remains. Apply fresh, matching grout into the gaps, wiping away excess with a damp sponge before it sets completely. Once dry, applying a high-quality grout sealer will provide a protective barrier against future staining and moisture penetration, significantly extending the life of the repair.

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