The answer to 'grout stained' is that grout can become stained for a variety of reasons, including spills, mold and mildew growth, and general wear and tear over time. Symptoms include discoloration, fading, and a dirty or dingy appearance. Solutions can range from DIY cleaning methods to professional deep cleaning and resealing, depending on the severity of the staining.
For minor stains, homeowners can try cleaning the grout with a grout brush and a mild cleaning solution. For more stubborn stains, a grout cleaner or whitener may be needed. If the staining is extensive or the grout is cracked or damaged, it's best to call in a professional cleaning service to properly clean, reseal, and restore the grout.