How the heck do I remove the drivers side air vent? I understand there is a grounding block behind it that I want to De-Ox the contacts. I'm sure it must be fairly simple. And if anyone can confirm that grounding block behind it I would be thankful indeed. I have this HVAC issue I'm trying to resolve. Trying the cheap and easy stuff first. I'm cheap that way. This is on a 1999 F355 Spider.