I have found that window cleaning always includes a wide number of different types of cleaning like after doing the windows, you always need to wipe the window frames down.
If you are cleaning a large square footage home or business or even smaller types of homes and businesses, it is very common to have to also clean light fixtures that might also have glass around them. A good tip and tool to use for this type of cleaning is the micro fiber cloth. This cloth, because of the fiber will allow you to clean the surface without leaving streaks.
Another good tip and tool is the water fed pole and the de-Ionized water system which cleans your windows spot free. There are so many different types of de-Ionized water systems. There are even water cart systems that come with even more than just a de-Ionized tank, but also a reverse Osmosis system along with the De-Ionized tank all in one unit. These systems are referred to as a water carts.
The water fed pole helps save a lot of time, but if you are doing a detailed job and the windows have not been cleaned on a regular basis, the windows might need to be done several times to be brought back to life or cleaned with a strip washer and squeegee. Learning how to clean thoroughly is a tip all in itself.
A lot of learning how to clean thoroughly is that you must go over and check your work and learn how to look for mistakes. A lot of the time you need to go over the cleaning the second time to get it to look the way you want.