My mum lives in a council house with her elderly mother. 13 years ago when she moved in, the windows in the property were a 50-50 mix of iron frame and UPVc frame single glazed windows.
Originally the council replaced all the iron frame windows with UPVc double glazing. 5 years or so, they also changed out the UPVc single glazing for double glazing.
After 13 years, the original double glazing job is in a pretty poor state. Some of the windows are almost translucent with condensation and condensation residue and there is no way to clean them because the condensation is on the inside of the glass sealed units, between the panes.
I believe the dessication agent used in the sealed unit panes has absorbed all the moisture that they are able, and now any excess just ends up as condensation. All the windows done five years ago are still going great.
As it's a council house, will the council replace them, or as they are still functioning as double glazing and serving their insulation purpose - you can still see through them, it just looks like crap - they will tell her to make do?