The answer to 'why is my tile moldy' is that tile and grout can develop mold and mildew for several common reasons. Excessive moisture, poor ventilation, and lack of regular cleaning are often the culprits. Mold can appear as discolored, fuzzy patches on the tile or grout, and it can emit a musty odor.
To address the problem, first identify and fix the source of the moisture, such as leaks, high humidity, or poor drainage. Then, thoroughly clean the affected areas using a mold-killing solution. If the mold is widespread or keeps returning, it's best to call in a professional cleaning service to properly treat the issue and prevent future mold growth.