Did a first clean on a country house with modern Georgian windows. Having removed all the dirt and grime it ins apparent that there is paint and building material on the windows. Silicon, grout, cement, you name it. Even glue on some windows. Nothing we haven't all seen before. Except maybe the glue. What makes it frustrating is the Georgian windows. The customer has asked for the building metering to be removed and it's happy to pay for my time. Is there any tricks or methods anyone has come up with to aid removal of this stiff other than scraping each individual pain? The scraper is going to be used lot. Just wondering if anything can be done to assist? Solvents maybe?