2012 Audi A4 brake fluid reservoir overfilled

Hi I wonder that some one can help me urgently, yesterday I putted some dot4 in my audi reservoir. I did 2 mistakes, 1. I filled the reservoir full I think more than maximum and 2. When I was pouring the dot4 in the resevoir a little bit like 2 teaspoons fell on the reservoir I dried it up with the towel but as you know the a5's reservoir is covered with another metal cover? What shall I do? And can I cause any damages