Hi, You need to remove the complete arm and re-position. To do this there is a cover at the base of the arm which will clip off and reviel a nut which you will need to undo, then wiggle arm left to right to release arm, then reposition arm closer to your scuttle trim and re-tighten nut, this will stop it traveling to close to your edge of the screen. hope this helps.
Sean, June 2008