After Thanksgiving heralds the bi-annual washing of the window. My favorite formula for streak free windows comes from a German website called Frag Mutti.
My tools are as consist of a window washing mop, professional squeegee, and newspaper (only the black print).
My window washing formula consists of warm water, a half cup of isopropyl alcohol (91%), and just a drop of dish washing soap.
First we remove all the screens and place them in a galvanized tub filled with water and some dish soap. The exterior window get a hosing with a strong jet of water. Then a thorough wash with the window mop and a few swipes with the squeegee.
To make the glass streak free and sparkle, I crumple newspaper into balls and finish off the job.
After the insides have been cleaned, we replace the screens. The tracks get a squirt of oil for lubrication then we sit back and enjoy the view.