So...https://forums.nicoclub.com/sunroof-dra ... 08588.html
After further research ive found this post on an infinity sub
(No dice on searching with "sunroof" excluded)
It makes sense that the end flaps would become caked with dirt and clogged.
Yet, I honestly dont remember seeing anything resembling rubber or plastic tubing running down EITHER of my Apillars when I removed my dash to replace my blower motor.
I'm considering the possibility that it has something to do with the black trim that runs the length of the "room", as its called in the fsm.
Ill check under my A pillars later today and take some pics and if there's nothing behind them then the next step would be to try removing those trims to see if there's anything under them.