dadwolf2 wrote:
So bottom line is if it's gets suspicious or bad enough, you should just remove window or ___ completely, clean it, reseal it...do it right.
That is right. You remove the trim ring inside, you will see screws all around to pull the trim ring but, tape the window on the outside so it won't fall out. Chances are it won't fall because of the sticky bytule tape on the mating surface to camper body.
When the window and camper body is clean of all caulking hold the window in the opening and mark each side with pencil to the points it moves to and stops (up down, side to side) and then that will tell you when it's centered between the marks so you get a better mating/ mounting all around. As said before some opening rough cuts are sloppy so this helps with centering an even install.