I had the Sonata parked in the sun most of the day on Saturday while I was cleaning the garage. Pulled it back in Saturday night and Sunday morning when I get in to leave and turn on the AC and adjust the vents I see what looks like melted plastic on the vents itself. So I get a piece a paper and poke at it and it gooey but not sticky. Do they use some type of lubricant to keep the vents from sticking? Has anyone else notice this?