Soak it up with some bread soldiers.
It was an old yolk I poached from someone else and scrambled it down quickly. I could have coddled something else I suppose before someone else beats me to it. Ohh the eggcitement has got to me!
I done a first clean yesterday who's windows had suffered an egging. It was a bit of a bitch to be honest, I had to go over it a few times and take the scraper to it as well. Good luck