What Homeowners Should Check First About Mold on Grout and Caulk

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When you notice dark or patchy stains on grout and caulk, first check if the discoloration is superficial or if the material is actually starting to crumble. Press a dry finger into the grout—if it feels soft or powdery, moisture has broken down the seal, and mold may be growing deeper than just the surface. Look for damp spots, especially around tubs and sinks, and verify that caulk lines are still fully adhered with no peeling edges, because once the seal is compromised, mold can thrive behin…