Well that is a thought.... This DP had been taken real good care, 21000 miles which seemed like low miles for a 2005... Dealer owner and salesman are good friends so trust is solid but it was missed on prep by a lazy cleaner I suppose... The odd part was that it was hard to get of my finger after I rubbed on it to see what it was so, ASSuming lol it was exhaust, Mold had never even came into my head but I bet you are correct sir.... Anyway to check that it is mold from being parked for a while and not DExhast?? Or maybe as well the proper cleaner to use on the liner? ? Thanks for the help and hope you are right. I was worried it may be an exhaust leak