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			 Resident Curmudgeon 
			
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			 Wizard 
			
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		#18 | 
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			 Enthusiast 
			
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				Join Date: Sep 2008 
				
				
				
				Device: Kobo Glo, Kobo H2O, Kobo Aura 1, Kindle Voyage, Kobo Forma 
				
				
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			New owner of Kobo Glo here, had it just over a month and whilst on holiday in Tenerife last week noticed this thin line whilst in the sun - not on every page just every few pages - noticed if I went back to a page that had the line on it sometimes disappeared.  At first thought it was a problem with the epub but seemed to happen on all books.  Back in the UK and no sign of the line so assume it might be a overheat issue ?
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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		#19 | |
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			 Guru 
			
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				Location: DE 
				
				
				Device: Kobo Glo 
				
				
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 I had a ereader with a SiPix screen and that screen was a lot worse than the pictures shown in this thread. When the temperature of that SiPix screen was 35° C or higher the screen slowly faded to black/dark grey and looked like a badly photocopied page. The page became unreadable.  | 
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		#20 | 
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			 Groupie 
			
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			Weird.  Wife and I both have Kobo Glos that we used on a beach in Thailand for a month earlier this year.  Extremely hot and humid and had no issues whatsoever.
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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		#21 | |
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			 350 Hoarder 
			
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				Location: Midwest USA 
				
				
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 If you try to extend battery life (like many of use) and push the refresh beyond what Kobo allows (1-6), that's when the dark lines will start forming.  | 
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		#22 | 
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			 Groupie 
			
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				Join Date: Oct 2008 
				Location: Citizen of the World 
				
				
				Device: iPod Touch, Nook Colour, Kobo Touch, Kobo Glo, Nexus 7, Nexus 5, Pixel 
				
				
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		#23 | 
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			 350 Hoarder 
			
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			That's why you don't see the dark lines start to form.  It takes quite a few page turns for me to start having them appear on my reader in the sun, without actually counting, I'd guess in excess of 10. 
		
	
		
		
		
		
		
		
		
		
		
		
	
	Some of us have manually set refresh to anywhere between 50-100 pages. It seems to be a heat issue causing it, but refreshing the screen clears it.  | 
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		#24 | |
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			 Wizard 
			
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				Join Date: Nov 2010 
				Location: Ottawa, ON 
				
				
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		#25 | 
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			 Enthusiast 
			
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				Join Date: Jun 2013 
				Location: Netherlands 
				
				
				Device: Kobo Glo HD 
				
				
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			Yesterday I was using my Glo in bright sunlight (in temps around 27c) and a couple of hours later a faint vertical line appeared exactly half way across the screen.  It was virtually invisible when reading without the light but jumped out of the screen with the light on or when refreshing.  It was also very visible on the homepage, slashing the tiles. 
		
	
		
		
		
		
		
		
		
		
		
		
	
	No matter how often I refreshed the line wouldn't shift. I was pretty upset as I love my 3 month old Glo & wasn't looking forward to the hassle of trying for an exchange (I'm based in the Netherlands). After reading this thread about the lines being caused by heat, I popped my Glo in the fridge for 20 minutes or so just to see what would happen. When I retrieved it the line was gone - completely gone! I'm going on holiday tomorrow & the Glo is likely to experience more high temps. It will be interesting to see if the line re-appears. But for now I'm a happy-bunny.  | 
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