What a normal wash cannot move off glass
Some glass is past soap and a squeegee. Hard water dries into mineral scale that reads as a permanent haze. Sprinkler overspray lays down calcium in the same arc every season. Concrete slurry, mortar and rust run-off bond to the surface and only get harder the longer they sit. If a pane turns cloudy again right after a standard wash, it is one of these, and it needs a different method.
Google reviewer Kelly Port put it plainly: “My windows look incredible! They were so dirty that a regular washing wouldn't do - they had to be scoured with steel wool.” That is the glass this service exists for.
