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Hersbird · 08-06-2019, 01:35 PM

Some vehicles get less dirt on the back glass because they have a diffuser or slots through the rear roof spoiler to push clean air off the roof across the back window. My Forester had a plastic diffuser and my Minivan has a slot in the spoiler.

08-06-2019, 01:35 PM	#5 (permalink)
Hersbird Master EcoModder Join Date: Feb 2014 Location: Missoula, MT Posts: 2,668 Dark Egg - '12 VW Touraeg Thanks: 305 Thanked 1,187 Times in 813 Posts	Some vehicles get less dirt on the back glass because they have a diffuser or slots through the rear roof spoiler to push clean air off the roof across the back window. My Forester had a plastic diffuser and my Minivan has a slot in the spoiler.