Too dirty when they cleaned it, or, your window wipers are too dirty and have been causing this when u use them. Can u see if the spider web is in the wiper area only? If not then its most likely due to bad pre-cleaning from the wash guy.
Glacier Ag. F31 328iA M Sport oct. 2012
| Sport Automatic | Adap. M Susp. | Pano. Moonroof | 20" ATS Racelight Grey w. Michelin PSS| M Sport brakes | Harman Kardon | Elec. Seats | PDC F&R | ACC Stop&Go | 335i MPE | Perf. Parts |