I carry my N3DS XL with me everywhere, and I am very careful with it. But when I got home today I turned it on and I saw this colony of black dots-
And I was wondering what I could do about this, and what it is. My Nintendo warranty is still valid, but idk if it covers something like this. I keep it in my bag, and I always lay it down gently, and it's close to the middle so it's never really nugged. I hope I can get it fixed, because it's very distracting.