The answer to 'grout discolored' is that there are several common causes, including improper cleaning, exposure to moisture, and buildup of dirt and grime. Discolored grout can appear stained, yellowed, or darkened over time. The good news is that there are several solutions, both DIY and professional, to restore the grout's appearance.
For minor discoloration, homeowners can try DIY grout cleaning methods like using a grout brush and a pH-neutral cleaner. However, for more stubborn stains or extensive discoloration, it's often best to call in a professional cleaning service that has the right tools and expertise to deep clean the grout and seal it to prevent future issues.