The answer to 'window moldy' is that mold growth on windows is a common problem caused by excess moisture, poor ventilation, or water leaks. Symptoms include visible mold, musty odors, and potential health issues for occupants. Solutions include cleaning the mold, improving ventilation, and addressing the root cause of moisture buildup.
Homeowners can often address minor window mold with DIY cleaning methods, but larger or recurring issues may require professional mold remediation services to properly identify and fix the underlying moisture problem.