The answer to 'my bathroom is filthy' is that a dirty bathroom can be caused by a variety of issues, including lack of regular cleaning, hard water buildup, mold and mildew growth, and improper ventilation. Symptoms may include stained sinks and tubs, grimy tile, foul odors, and visible mold or mildew. To solve the problem, you'll need to thoroughly clean and disinfect the entire bathroom, address any underlying issues, and implement a regular cleaning routine.
For minor issues, a thorough DIY cleaning with the right products can usually resolve the problem. However, for more extensive damage, stubborn stains, or recurring mold/mildew, it's best to call in a professional cleaning service to ensure the bathroom is properly deep cleaned and treated to prevent future problems.