The answer to 'why is my grout buildup' is that grout can accumulate dirt, grime, and soap scum over time, leading to a buildup of discolored, stained grout. This is a common issue in bathrooms and kitchens where the grout is frequently exposed to moisture, spills, and cleaning products.
Some of the main causes of grout buildup include lack of regular cleaning, using the wrong cleaning products, and improper sealing of the grout. Over time, the porous grout can absorb dirt and stains, making it appear dingy and discolored. In some cases, mold and mildew can also contribute to grout buildup.