Hi all, we have water stains above the windows in our bedroom. The bedroom is a converted loft/attic so the windows are slanted Fakro. The stains have been there since we moved in, and when we moved in the previous owners had left the windows open from at least June to end end of august (when we moved in house). So we’re unsure if it’s something to do with the windows being left open or something else. They’re not damp to touch but paint has stated peeling on one side. Any ideas? Thank you!