I noticed, under bright sunlight that there seems to be an area of my screen that "looks" different from another part of the screen. Initially I thought that it was just oil from my finger but when I tried to clean it, it does not go away. Even when I tried to clean it with a damp cloth, that part of the screen drys slower. Do you guys think it is a cause for concern, especially over the long term? Pictures of the screen when I wipe it with a damp cloth (notice part of the screen dries slower): https://imgur.com/a/Zz79wWV Also, I realised that part of the screen also gets dirty easier. Should I just use it as it is, or bring it to an Apple store?