A person is cleaning a glass window with a squeegee, removing soapy water and leaving clear streaks—a common task for conservatory builders working on glass rooms or greenhouses.
2013, Conservatory Advice, Conservatory FAQ's, Tips and Tricks

The Art of Window Washing

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So, the conservatory got a bit dirty over the winter, did it? Things a bit drab and dusty?
This is the time of year when one looks outside and says ‘I will never get it all done!”