Waxy/oily white residue when using an outdoor car cover??

[trax]

I`ve always had this happen to me on whatever car I`ve owned.


Currently driving a 2010 boxster



I buy a decent car cover, doesn`t matter the manufacturer (so far) and after a few days I notice some waxy/oily white buildup all over the car and the windshield. This happens with whatever wax I use doesn`t matter what brands it`s all the same.` I`m wondering if anyone else has encountered this problem? My car is under a car port so, no direct sunlight. Has anyone had this happen to them? Or found a fix for this. You spend hours detailing the car and in about 3-4 days it`s pretty much ruined with whatever is happening under the car cover. I don`t get why it gets onto the windshield/heaslights as well.


Thanks guys!

[bunkeroo26]

Help me understand this.....


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You have your car parked under a "car port" and


you also have a canvas car cover over it?


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This canvas cover then makes a waxy buildup?


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I really don`t have a clue what is happening....


But, have you tried using a seal?