Case fumes damage iPhone screen?

Ok new iPhone user here. I can't tell I'm imagining things but it seems like my screen is a little tacky, as in my finger doesn't slide across it well. It's not sticky at all,as in doesn't grab my fingers when I lift them from the screen. I bought this [http://www.amazon.com/gp/aw/d.html/ref=mps_a2/184-8750761-4731015?qid=1246547966&a=B001CJTE0K&sr=8-2] case. It smelled like terpintine so I let it air for a bit but eventualy I put my iPhone in it for about 4 hours. I decided I couldn't deal with the smell so I gave the case away. What do you guys think? Am I just imagining things here? Is it possible that the fumes made the screen less glidable?