Leave it alone. It WILL evaporate. It etches in but I have noticed that the ones I have gotten in all my vehicles (my previous was JET BLACK), have all GONE away to an extent that it is barely visible, if even there... I PROMISE.

Best thing to do is to wash off as soon as possible (sometimes even 5 minutes there is too late). A clay bar will remove the top layer that still sits on the surface, but w/e has penetrated will end up staying for a little while longer, but will eventually go away. I have no real explanation for it, but thats my experience with all the cars I've owned and have worked with and seen later on.