I feel a bit of a numpty asking, but I lived in a hot climate for many years and since returning to the UK kept my car in the garage, until the T6.1 came along

so am not used to these cold mornings. Apart from some frost on the outside which clears easily with a scraper or the wipers, I have condensation on the inside of the windscreen. I have a heated screen, but it seems ineffective. Maybe I'm using it incorrectly? I've tried deciphering the instructions in the owners manual, but they make little sense to me.
What settings should I be using for the quickest way to clear the condensation? (I absolutely detest wiping the screen with a cloth!)
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I would have thought with the engine running: A/C on, max heat, max fan, direction windscreen, and heated screen on. Maybe I also suffer from unreasonably high expectations, but it seems to take an eternity to clear. Or maybe I'm doing