It's the screen's anti reflect coating peeling. Apple had a screen replacement program for these issues, I had mine replaced (only had peeling near the front facing camera, nowhere else). The program is valid until your computer is 4 years old (4 years from purchase date). So, most likely now your choices are to replace the screen and pay 400+ dollars to Apple or remove the whole coating yourself (Google tells you how).
Tried Listorine and baking soda didn’t help, but then I went to Lidl and got W5 multi-surface wipes and got rid of the coating. Brilliant, thanks for help you all
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