The answer to 'why is my bathroom filthy' is that there are several common causes, including poor cleaning habits, hard water buildup, mold and mildew growth, and general neglect. Bathrooms can become dirty and unsanitary over time if not properly maintained.
Some of the key symptoms of a filthy bathroom include stained and discolored surfaces, a musty odor, visible mold or mildew, and a general feeling of uncleanliness. These issues can be caused by a lack of regular cleaning, insufficient ventilation, and the buildup of soap scum, hard water deposits, and other grime.