Howdy yall, let me start by first saying that yesterday we had nearly 4 inch of muchneeded rain. we also had temperatures down in the low 40s last week. so i don't know if those factors have anything to do with it, but the outsides or corners of my VFTs are startign to turn black! can someone tell me waht they thinkis going on? I have 4 pictures that i have taken this morning: