Got around to pulling the passenger seat and carpet. Thanks VStar, these instructions "
2018-rogue-moon-roof-weatherstripping-r ... 31380.html " were perfect, explained everything. I ended up finding a decent amount of water and possibly some white mold. spent some time cleaning it. Now just waiting for it to dry.
Do you think any water would have worked its way over to the driver side? It does not feel damp.
I have been taking lots of pics along the way, so hopefully I can upload them when I'm all done to help the next person.