Did you check if your rough opening was square before you started shimming? I've found that even a slight misalignment there can cause headaches down ...
Interesting points about vinyl discoloration—I noticed the same thing on my south-facing windows after about five years. It's subtle, but once you see...
Yeah, bathroom vents can be sneaky culprits for sure. Have you checked if the ducting is insulated properly? Had a similar issue myself—thought it was...
You're not alone—most folks don't even realize there's supposed to be a "schedule" until something goes wrong. I've been in my house for about 8 years...
I've thought about the frosted film too, but does it hold up well over time? I've seen some windows where it starts peeling at the corners or bubbling...