Hello colleagues, have ugly stains on my door rubbers outside -> see attached picture. The stains were already when I bought the car 5 weeks ago (Ford Focus tournament, 1 year old!). Does anyone know how to get rid of them best? Did I try to scrub away temporarily with spit before, but there’s nothing going on. Which medium could I try there? Rinse water? Or is that bad for the rubber? Would be super grateful for every tip! S.