Years ago, my dad had an '87 Chevy wagon with a rear spoiler. No matter what the weather, that rear window was always pretty damn clean.
My Jeep on the other hand, doesn't have one and the rear window is ALWAYS filthy, be it road grit, dust, or salt spray.
I'd buy one for my Jeep, but I haven't found one yet that works with the opening rear glass of the '97 & 98's. They seem to only be available for the earlier models with the fixed glass.
