Your building's management will clean the outside window in high rises but not those onto balconies. They should do that every 2 months at least. Mostly exterior windows on high rises can only be cleaned with special cradles and work men specialized in doing that.
i've used ecomaids before and hired male cleaners to clean up the whole of an empty terraced apartment that had a large outdoor balcony and tall windows...
I've recently moved to the tecom area and after that sandstorm my balconies and windows are filthy. Can anybody recommend any cleaning companies to use in the area and a rough price I should pay. Thanks