I have a 96" 850 the drivers wiper blade does not clear whem its have way up and the passenger will not clear when its almost up. i have found that the arms lift off the windshield instead came anyone give me an idea.

 

Bend the wiper arms so that there is more tension on the windscreen. That should fix it.

 

A quick search yielded this thread:
https://volvoforums.com/forum/volvo-850-16/wiper-wont-touch-half-drivers-side-windsheild-45627/