Quote:
Originally Posted by Recumpence
Oh, in order to create the needed clearance for the covers, I removed the black plastic bezels. When I did that I found the inside around the lights was full of insects, dirt, fuzz, etc. Air was getting into that area and trapped.
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Air getting trapped in a sealed area would be less of a problem than air leaking into a chamber, then leaking back out in another section.
This is because a proper air-pocket would not be formed.
Think of the nose of an electric car or rear engined car (old VW Beetle/Porsche) versus a typical front engine car with radiator up front.
Hence why a grill block works so effectively.
If the area behind your fog light looked anything like this one below, I can see a potential problem.
How to: 08-11 OEM fog light install - Focus Fanatics
Did you take any photos of your work mid-course Matt?
Simple and common
weeps which allow moisture and condensation out of a semi-sealed area might be to blame.