Found a small smudge on my screen, probably finger prints as I was reaching around the back to plug in a cable the other day, went to wash it off with the cloth I use to wipe my glasses as eye glass cloth was recommended to clean my OLED screen and the smudge has got worse and I feel I've damaged the screen. I only bought this TV in January so I should still be covered under warranty but feeling terrible today as a result of this.

Image attached to show the damage. Is this still able to be wiped off? It doesn't affect the overall image, its only noticeable on an all black background with a slight dark patch on bright white elements so it may only be the reflective coating affected.