It’s never easy to clean after builders. You find dust, dry cement and other marks on your glass. In some cases you are not even able to look outside how grimy the windows are. We have just done a job recently, where the customer had scaffolding for a while and the windows were left in a bad state. We cleaned it all with hot soap, just soften it up, after we scrub it down with our poles and finally rinsed it out with our purified water.
