Windscreen wipers clash together

On my Zafira,
the windscreen wipers have a bad habit of clashing together near the end
of the stroke, as if one is sticking to the windscreen.
It has had a replacement windscreen. I suppose that the wiper arms could
have been removed and replaced a few notches off on the splines.
Is there a set procedure for setting them up?

 

yep there is, but the easiest method diy wise, is to turn off the ign when
the one that is correct is at 12o/c (or at its widest sweep)
then pop off the other from it's spline and set to the same (mirrored)
place.

mike

 

Park the wipers in the usual place - distance from the bottom of glass to
first blade is 32mm and to 2nd blade is 88mm.

 

Also, are the blades correct? If they are non-genuine they may be a
little too long.

Alan

 

Thankyou. I unbolted the upper wiper arm on Sunday, and repositioned using
these measurements. Seems to have solved the problem.