a permanent app mark on samsung galaxy s3 (i9300) screen

hi guys i have a samsung galaxy s3 (i9300) and i use it for 4 years now .recently I noticed that there is a permanent marker on the top of the screen which is not scratched or dirty but faded remnants of the Facebook Application which I use a lot and are almost invisible and be more visible in the white screen. I tried removing the battery and factory reset, but nothing happened. Is there an easy way to remove them.help please
Here is the picture...

a permanent app mark on samsung galaxy s3 (i9300) screen

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