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      02-01-2013, 07:26 AM   #13
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Sethism's Avatar
Drives: 2009 328i Xdrive Coupe
Join Date: Jan 2013
Location: St Louis

Posts: 123
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Looks like the window lamination (either factory or tint) has a few few small ridges folds, or (more likely) cracks in it that allows condensation through to form those ice crystals. Really cool.