Window Cleaning

Our old-style double glazing consist of double windows hinged together. So every window has four sides, which makes this a very time consuming chore.  Today I did the upstairs windows - 5 windows, 20 sides of glass.
After around 30 years of doing this every spring and most autumns, I'm beginning to feel I've finally cracked the method. Every Swede has their own method, which they swear by, and they often differ wildly so I won't bore you with mine.