This might fall into the category of dumbest question ever (a line I
often walk).  My rear wiper on the 95 850 turbo wagon only covers
about half of the window, losing contact with the glass about midway
through the stroke and leaving a dirty half-moon at the top of the
window.  I've replaced the wiper blade, but is there some secret to
getting the wiper to hug the glass through the entire pass?  We used
to just bend the dang arms on cars when we were kids to get them to
contour correctly, but I wonder if it is just a spring that can be
tightened or something like that.  

My quick google search and volvo forum search turned up nothing on
this and would sure appreciate your help.  Thanks.
South Dakota Tom