Virus Snow stains on screen glass
 

Hello people, would love to have a clue on a way to remove this weird stains on my Snow's screen plate. I have just bought it used and in near mint condition, the stains didn't look so intense in the seller's pics, but now that I have it they are a bit annoying, getting in the way of the LCD. It is apparently superficial but has no bumps and immune to rubbing of any kind. Any thoughts?
PS: I can't access (haha) the official forum, is it closed??

https://scontent.fmvd4-1.fna.fbcdn.n...d5&oe=618835F7