Wash it... Trying a quick spray and microfiber towel is fine on smaller areas, but if the whole car is covered with stuff it's easier to just wash it.
You need to wash it properly though. A few searches around here and you'll find some good sites that can show you the details of a two bucket wash method. Good luck!
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'11 BMW E92 ///M3 - ZCP and DCT
'15 Ford F-250 - Lariat, 6.7 Powerstroke Turbo-diesel
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