That style clearance light is notorious for providing a place for water intrusion. The rubber gasket gets cooked in the Sun, becomes brittle, then doesn’t seal. At 6 mos old, 2 of mine fell out in my hand while inspecting for water intrusion. And I would suggest not using WD40 on any rubber. It’s petroleum based and will deteriorate the rubber. I use mineral oil or Murphy’s soap. I then glopped the lights good with proflex when reinstalling.
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