Does anyone know whether the drainage tubes in the Cayenne sunroof are rubber or plastic? I recently had a rain storm INSIDE my Cayenne thru the driver side rear roof handles inside the car. Porsche dealer said rain was coming in thru the sunroof drainage holes. A forum advised to put a soft tube or wire thru to dislodge anything that may be in there. Initially I used a pliable clothes hanger then resorted to a soft plastic covered wire. But I hope I didnt do any damage from my first attempt.