I recently grabbed a window cleaning kit from mitre 10 (new zealand) from Browns and began cleaning the windows. I simply used water and dishwashing liquid, microfibre scrubber and squeegee.
From the photos, when direct sunlight is hitting the windows there are all these marks that look like someone used sandpaper on the glass (top half). However, as the sun stopped hitting the window the clean window appeared again (bottom half). Has anyone seen this before/ know what it could be?
These are not streak marks as I purposefully added solution to a neighbouring window and let it dry in the sun and it looks completely different. I also ran my fingernail accross and the glass is smooth on both sides (double glazed).
