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I have always used screen protectors on my phones, but on my iPhone 6 just started using the Tempered Glass.. My question is, when I was at my Verizon Wireless store the other day an associate told me that using a Tempered Glass screen protector actually hurts the screen. He said the chemicals on the tempered glass actually ruins the phones original oleophobic coating. So he said it is a tradeoff, use one and don't have scratches, or use a screen protector and when taken off it will ruin the phone screen...what is everyones opinion on this? Is he correct?