Why Does Grout Turn Black? Causes, Fixes, and Prevention
Grout turns black when moisture carries mold, soap residue, body oils, dirt, grease, or mineral deposits into its porous surface and joints. In showers, mold and biofilm are common; on kitchen and floor grout, embedded grease and tracked soil are often more likely. The correct cleaner depends on the stain’s texture, location, and recurrence. Key […]