What is a recommended way to keep your vehicle's windows clear in humid or rainy conditions?

Using the defroster or air conditioning is the recommended method to keep your vehicle's windows clear in humid or rainy conditions. This approach works effectively because the defroster directs airflow to the windshield and front side windows, which helps to remove moisture build-up. The air conditioning system dehumidifies the air, which further reduces condensation on the glass surfaces.

When you use the air conditioning or defroster, it helps maintain a clear line of sight by preventing the windows from fogging up. This is crucial for safe driving, as obscured visibility can lead to hazardous situations. While other options, like using windshield wipers or turning on the heater, might assist in certain ways, they do not directly address the issue of excessive humidity and moisture on the glass as effectively as the defroster or air conditioning does.