Try moving the mirrors, or place a hand in front of the drivers door mirror and see if it stops (you can try the passengers one if you find a nice long piece of straight road!!!)
I think I had something similar and positioned mine 'up' or close to the side screen (by moving the arm in the bracket). It made a difference (i have the Librand round ones and cut around an inch off the stem and meant I could lower them as well and they still give me great vision to the rear (as you would hope!)
