Do you see discoloration, gray streaks, smudges or lines in your RV windows? Do your windows appear foggy or cloudy? Are you having trouble seeing out your RV windows at all?
The window seals are damaged - moisture intrusion.
Factory fresh windows are sealed - and discoloration is prevented by the presence of a waterproof seal between the panes. If you see any of the above issues, you may be subject to a loss of seal protection, and possibly have become the victim of premature discoloration and/or window fogging.
This condition is both unsightly and dangerous. Complete window replacement is expensive - and often unnecessary...