What type of windows do you have?
Is the fog in between the panes? If so the seal could be broken and there isn't a cheap fix for that.
Hello Nila. Here is some information that may help you. https://www.thespruce.com/what-to-do-when-window-seal-repair-fails-1822895
Call a window company that does window REPAIRS not window replacements. To replace window you are looking between 2-3 hundred dollars. A Window REPAIR shop can often remove small plugs the hold the window together and replace a the seal that is causing it to fog.
I don't think it can be repaired.......I think it needs to be replaced.....
Hello, how old are the windows, many times they’re under warranty.
We have window world windows and we were able to request replacement over the phone by reference the warranty sticker thats applied on each window.