Window Question

[Kevin Pfeiffer]

A house that I'm working on has Anderson casement windows. About 8 of the panes on different windows have some "fog" in them. Question is : Can I have these fixed somehow versus window replacement ? They are pretty big windows = approx 3 1/2' by 4 1/2" so I know they will be expensive to replace. Any advice WBMA (would be much appreciated !) --> don't know if this one exists or not. If not, you saw it here first !! Thanks in Advance.