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Discussion Starter · #1 ·
It is possible that the speaker grill is reacting with the natural gases that the vinyl and plastic trim puts out? Over time, many cars get a film of gunk on the inner windshield because of "vapors" (if thats what you call it) from the interior trim.
 

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Possible that it is from cleaning/protection product? Maybe the cloth in the grill absorbed it?
 

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That looks like the migration of a lubricant, possibly... I wonder if something accidentally got on there during manufacturing, or if something was applied to deal with a squeak?
 
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