Hi Darren40, i have recently fitted the same to my Tekna and have had no probs with them at all. is it possible the clips are incorrectly fitted as i did that the first time. the easiest way i found was to pop the deflector into place first with the double sided tape on and then push the clip into place with a screwdriver behind the deflector. the clip has a pointed anchor point on it , this faces the inside of the car. it took me about 10 mins to do all 4 ..the first time i did it i thought the deflector went into the V of the clip but it doesnt..have a look at the video on this page which shows you how it is done but put the clips in last, it is so much easier. do this from the outside part of the car