Homeowners generally consider cleaning the outside of the windows during springtime or the approaching fall season. But now, modern design of windows allows their convenient and easy cleaning. Some of the windows are so designed that their exteriors can be cleaned from within the house. Manufacturers employ fold down method for such windows and it was introduced in early 90”s.
Windex or some other similar kind of a cleaning agent is used by most of the people for this purpose. But all cleaning agents necessarily have to have either ammonia solution or vinegar that performs the cleaning action.

For cleaning traditional type of a window that slides down from the top, you should start from its top followed by its top back. Having finished that, you push the window back in its right position and then work on its lower half. You should start cleaning the outer side of the bottom half of the window and then come to finish its internal side. These windows often have window screens and don’t forget to remove those before you start working.
You may come across vertical roll out windows like Anderson. Here again, you need to remove the screens before getting started with window cleaning. Making use of the handle, roll the window to open it the most. An easier way of cleaning such windows is to start from its outer side by sticking your hand thru the gap between the window and its wall. Then, roll the window to its closed position and wash the inner side of the glass. You may have big windows that can’t be opened. You will be required to clean them from the outside by spraying a cleaning solution and wiping it off with a sponge.

A ladder will necessarily be required for cleaning of big windows located at higher levels. Cleaning the windows of high-rise buildings or apartments poses problems and call for the services of professionals. Such jobs are usually executed by window cleaning companies, which have skilled manpower for doing the needful.
While hiring professional services for cleaning of windows, you should always insist on getting references and recommendations of others.