Welcome to the forum Jamie, you'll find the members on here are a friendly and helpful bunch :)
I suspect your a6 has headlight washers and obviously in the cold weather it's frozen whilst spraying and got stuck open. Not fully sure how to put it back in but I wouldn't push it in case it breaks. It might be worth you pouring warm water on it and the all the other nozzels and then activate the washers to see if that fixes it.
Cheers
Steve