The answer to 'how long does window cleaning cleaning last' is that the duration of window cleaning can vary depending on several factors, but typically it lasts between 3-6 months for most homes. The longevity of window cleaning depends on factors like the climate, amount of dirt and debris in the area, and how often the windows are cleaned.
In general, windows in dirtier environments or on homes with more exposure to the elements may need more frequent cleaning, around every 3-4 months. Windows in cleaner areas or on homes that are less exposed to the outdoors may only need cleaning every 5-6 months. Regular maintenance and cleaning can help extend the time between full window cleanings.