How do you retract the front headlamp washers on a 2006 Audi a8?

I'm not sure if there is a button i have to press or what. This car is confusing with all it's gadgets. Thank youHow do you retract the front headlamp washers on a 2006 Audi a8?When the headlights are on, and you hit the windshield washers longer than a second, they will go on. They will spray for about 5 seconds, then stop.