Prius Lower Window - Keep clear options

[Arragonis]

Does anyone have a magic spell, ungent or potion than can keep the lower rear window on a Gen3 Prius (2011) clear ? The upper window has a wash/wiper but the lower one doesn't and gets really mucky.

If it were mine I would clear it whenever needed but this is Mrs A's, and I have to do it...

[Rokeby]

I'm afraid that there's nothing to be done about the dust
that gets deposited on the rear hatch lower glass. if anything,
its presence is a feature, positive evidence of the excellent
aero design of the body.

Gen II Prius Aero Simulation

The rear lower glass is right where two votexes separate.
I dont know the exact mechanism by which the dust "falls
out" of the air stream, but I would guess either just plain
dampness on the glass or perhaps some exotic electrostatic
condition.

I'm afraid that you're just going to have to bite the bullet on
this one.

Repeat after me, "Yes, dear."

[Arragonis]

I see - I don't mind doing it except she remembers usually on an early start - you know when I'm still asleep and not the evening before when I wasn't.

I'm well practiced at woman taming - you know, when you are concentrating on something else whilst they speak and then you have to think of something to say, like "yes" - which 50/50 is the right answer...

[Piwoslaw]

[OT]
I never could understand how women could easily do complicated stuff like cooking, laundry, etc., and still need a man to do really simple things like turning a screw with a screwdriver or wiping something clean
[/OT]