Tile Floor Cleaning: Grout Staining Versus Deterioration

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When your tile floor's grout starts looking dirty, it can be hard to tell if it's just stained from years of spills or if it's actually deteriorating. Staining is mostly cosmetic—scrubbing with a cleaner might bring it back. Deterioration, though, means the grout is crumbling or cracking, letting moisture seep underneath and risking loose tiles. If you poke at it and it falls apart, that's deterioration, and you'll need to replace it, not just re-stain.