I recently bought a new MKZ, that had sat on the dealer's lot for over 1 year. Needless to say, the inside and out needed some minor attention and protection. The dash is dark gray. I have treated it with Surf City Dash Away, PB's Natural Look, and Megs Natural Shine. It still looks blotchy in places when you look at an angle. It looks much better than initially, but some spots still look "drier" than others. Should I just keep treating it every few days, or try something new? I've used 303 in the past. Would it help? Seems like I need a "conditioner" rather than "cleaner or protectant"? Would a leather conditioner help (I have Megs GC Cleaner & Conditioner)?