That or they weren’t cleaned properly in the first place. Whatever it is they should still be replaced under warranty.
https://postimg.cc/gallery/1ygfrvddm/
Had these bifolds fitted 2 yrs ago but yesterday notices the grime/ dust between the 2 panes so can’t clean them.
Do you think the sealed glass units have blown ? I’ve contacted the builder and window company
Andy
That or they weren’t cleaned properly in the first place. Whatever it is they should still be replaced under warranty.
Cheers guys.
When the suns not on them you can’t see the grime
Bloke from the window company coming Wednesday