Dust under Screen?

[Closingracer]

I just noticed that i have A dust particle under the screen near the top and left side and i primarily keep my case on the phone(along with a dead pixel i think) and i am literally 1 day after the 30 days..I kno that when i has an iphone apple simply cleaned it out but would samsung or AT&T or Bestbuy which is where i bought it from Fix this?