Weird stain on iPhone screen

Nonnieee

macrumors newbie
Original poster
Jun 7, 2017
13
2
Hi,


I went to the Apple Store yesterday to get a replacement for my current iPhone 7, since one of the volume buttons wasn't working properly. Today I went to a store to get a screen protector for my new phone, and when they were cleaning my phone screen they noticed a weird stain on the screen. Does someone have any idea what this could be? I already made a Genius Bar appointment, but I'm just curious.

Thanx!
 

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Relentless Power

macrumors Nehalem
Jul 12, 2016
30,426
30,685
That's hard to say. It looks like a stain from a substance that came into contact with the display and stained it. It won't come off at all? You could try a little warm water, minor amount of running alcohol and a microfiber cloth to clean it.
 

Nonnieee

macrumors newbie
Original poster
Jun 7, 2017
13
2
No, it won't come off. The people at the store tried cleaning it with a little alcohol as well, but they thought it is most likely missing some coating at that spot, since it has some scratches there as well... And I've been extremely careful with the phone since I have the jet black one, so it hasn't touched a substance. Besides that, I've had it for just under a day.
 

Relentless Power

macrumors Nehalem
Jul 12, 2016
30,426
30,685
No, it won't come off. The people at the store tried cleaning it with a little alcohol as well, but they thought it is most likely missing some coating at that spot, since it has some scratches there as well... And I've been extremely careful with the phone since I have the jet black one, so it hasn't touched a substance. Besides that, I've had it for just under a day.
The coating is known as the oleophobic coating. Something potentially came into contact with the coating or something rubbed against it, causing it to scratch the display. The oleophobic coatings purpose is to Protect against minor scratches and fingerprints. The oleophobic coating is organic and it eventually wears off after extended use.
 
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randfee2

macrumors regular
Jun 13, 2007
211
9
Germany
I found something similar on my new iPhoneX. Hydrophilic and fat-affine but much smaller stains. Impossible to wipe away with microfibre cloth.