The answer to 'my grout is filthy' is that grout can become dirty and discolored over time due to a variety of factors, including spills, foot traffic, and buildup of soap scum, mildew, or mold. Common symptoms include stained, discolored, or cracked grout lines that make the entire floor or tile area look dingy and unappealing.
There are several solutions for cleaning dirty grout, depending on the severity of the problem. For light to moderate grout stains, homeowners can often clean it themselves using a grout brush, grout cleaner, and some elbow grease. However, for deeply embedded stains, mold, or damaged grout, it's best to call in a professional cleaning service that has the right tools and expertise to restore the grout to its original condition.