I want to always be as visible to cars as possible:
High-vis jackets and a white helmet - whenever I ride. It's amazing to me how many riders are all black - mostly Harleys, lol. Gotta look cool, you know.....
Yes, the jackets get dirty:
Put some Shout pre-soak on the yellow then launder it. Comes out amazingly clean. Just don't let it get too grungy before washing.
Spots rub off easily with Simple Green on a rag.
Evitek LED headlight bulbs - big improvement! High beam if the sun is out or approaching an intersection, low beams otherwise.
I have had cars flash me - in the daytime! - so I know I'm being seen. Sorry if it annoys them, but my safety is more important.
In the rear, a Whelan TIR-3 brakelight strobe and reflective strips on the bags.