Hurry Limited Time. When spraying the exterior of a house we give the home owner two options, one option is not to spray around the windows as spray will get on the windows the problem with that is spiders love to live around the window ledges so the best option is to spray around the windows then a week later wash the spray off the exterior windows. At The Exterminators we have a window cleaner with 10 years of experience so when you book with us we can do the complete job. When you book with us you get $50 off exterior window cleaning. (Excludes Wooden Window Frames)