[Digitalracer]

Has anyone noticed this forming on the bottom rubber of the door rubbers?

 

[Tricky2]

Yes it will happen. Depends how often you clean it and how wet it 's been. Clean it with a (preferably not current) toothbrush more frequently.

 

[Digitalracer]

Thanks for the reply, I just didn't expect it so quickly on a new car!!

 

[Halin9]

If the car is left outside, not garaged, it can happen quite quickly..