The Problem: One wiper on my truck / car was not moving or rather it was moving a little but with out force.
The Answer: Most likely a simple fix for most people. A nut was loose after years of wiping and just needed to be tightened.
The Rest of the Story: I used a “paint can opener” (free from home depot) to pop the cover over the bolt off. I did this assertively by the way. After that is it as simple as tightening the nut / bolt down. Pop the cover back into place. Done in 60 seconds.
The pictures below are not mine, therefore you will notice that the tool being used to pry up the wiper bolt cover is different than the paint can opener I used. Ultimately you need something with a hook on the end to grab it efficiently.