Try a plastic restoration cream on your window trim! It makes a night and day difference.

https://www.amazon.com/gp/product/B071FRWWRF/ref=oh_aui_detailpage_o01_s02?ie=UTF8&psc=1

This is the one by Car Guys. All the plastic parts on my RSX and CRV look brand new and both cars are over 10 years old.