Why does rainwater pool into a shape of windshield wipers?

Question

I’m sitting in my car, it’s raining and wipers are off. However, I can clearly see how the droplets pool in a specific manner, reminiscent of wiper movements. Can someone explain the physics behind it?
Here’s how it looks like: https://ibb.co/C5M7YCL

In: Physics

Answer 1

the glass that is under the wiper’s coverage is cleaner/dirtier than the edges where the wipers dont cover. This causes the water droplets to behave differently due to the amount/lack of dirt or other chemicals to adhere to