this is the status of the screen of my 2015 macbook pro. I have always put a lot of care into the screen, cleaning it on a daily basis with microfiber cloths, but the result is still this, probably I did something wrong in these years. I will soon buy a new macbook pro and would like to prevent the screen from the same end.
Periodically wiping the keyboard and screen with distilled water damped microfiber cloths. I have separate cloths for the screen and keyboard/body.