You could try a strong APC solution & give it a good scrub with something like a toothbrushThere is quite a lot, looks like it soaked into the plastic!
Dave
APC = All purpose cleanerWhat's an APC solution?
It's my dad's car, only got it until my new one arrives. But would like to give it him back looking good
Dave
... on dirty nails !A nail brush works well too....................