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