There is a great retrofit from Audi that you can easily add to your car – the tripple windshield jets.
Part number: 4F0 098 101
It comes with a CD with full instructions on how to install and adjust your new jets. Here’s the original Audi Manual.
First, you need to open your trunk and remove the old washer jet pulling from the side of the window:
Then, place the two strips you receive with the jets the way shown:
Finally, plugin the new washer jet and fit it the same way, you’ve removed the old one. Congrats, all done!