For the first few years we lived in our house, the windows were cleaned by a company who basically waved a brush at them on a long pole, sprayed them with water, then charged us £13. As you can imagine, the job was about as good as I waving a magic wand at them.

Then we met a couple of local guys who actually clean the windows. Ladders, soapy water, squeegees, cloths, and obviously no fear of heights. Even better… It's only £10 for the front and back windows 🙂