No, we keep our windshields clean because you are in the back window, we keep the back window dirty so we don't have to see you in the rear view mirror.... :poke: :popcorn:
Magnum windows don't seam to pick up much, except the back. it's always filthy. Aerodynamics, no flow...
As for bugs, I think that has more to do with time of day. And if your near water, can be really bad.