Found that moisture has gotten under a window in my bedroom and then opened up that wall.
I then see that the previous owner has used plastic on both the outside and inside of the insulation... so the moisture has nowhere to go and just stays in between.
I am now going to tear down the entire wall on the inside; is it enough to cut away the plastic between the studs, or do I also need to remove what's between the studs/drywall on the outside?
I have no desire to tear down the exterior wall now in the winter!