A windshield that is cracked or broken is non-compliant during a pre-trip inspection due to its potential to obstruct the driver's view and compromise safety. Any cracks or breaks in the glass can also weaken its structural integrity, making it less safe in the event of an accident. Regulations require that the windshield be free from defects that could impair visibility, ensuring that the driver has a clear line of sight for safe operation of the vehicle.
In contrast, being too clean does not affect the function or safety of the windshield; rather, it helps improve visibility. Minor scratches may not significantly obstruct vision or weaken the glass, thus they are often considered acceptable. Airflow issues, while they may affect comfort, do not directly relate to the condition of the windshield as it concerns visibility and structural safety. Therefore, any cracks or breaks are the clear disqualifying factor in this case.