Replying to Questions on spring waxing and accumulated road grime in bindings.

Hey all, put about 25 days on my ARVs this year and i'm wondering if it's time for a base grind. Spring conditions are leaving my bases dry/whitish after 1 day post hand wax. Took a couple days when the snow was colder. Maybe time for a new base or is it just the slush conditions? I'm using a bulk blue universal wax from amazon and I don't think it's working well in the slush. Can y'all recommend a cheapish spring/slush wax?

Final question, my bindings have accumulated a layer of black road dirt on the greased areas. I'm gonna start covering them, but for now is there a good way to clean them and re-grease them without compromising them?

Thanks!