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In my case I don't think it has anything to do with temperature - at least not here in the UK! All I need to do is let direct sunlight fall on the screen through a window, turn the page and I see the problem. Move away from the sunlight and the problem disappears on turning the page. The temperature in my house is 21 deg C (69.8 deg F) and I only need hold the screen in sunlight for a second while turning the page.
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