I have one on my screen. I dont think its a big gorge scratch, but it is noticable...I thought it was dog hair or something at first...I've heard this is possible to remove depending how deep, but I wouldnt know where to began with putting chemicals on the screen...and dont want to do more damage experimenting with something untested...does anyone have experience with this sort of thing?
You could clean the screen. This may remove the scratch.
Step by step instructions on cleaning the Wii U GamePad Screen
Do not use any solvents or cleaners of any kind.
Do not submerge the system in water or other liquids.
Do not pour water directly on the screen.
What to do:
A long time ago I was looking for solutions to fix the scratches on my 3DS. There are a few on the market marketed to remove screen scratches for smartphones. WARNING: I personally haven't tried them as I didn't know if it'd affect the 3D capabilities of the 3DS screen so don't know if it works, but considering there's nothing special about the gamepad's screen compared to smartphones it could be worth a shot. Though the above suggestion of just cleaning the screen with water should help most of the time as what looks like scratches is just grime or whatnot.
Ill try whats posted but i know for sure its a scratch...I could kind of put my fingernail and feel the scratch. Think of a sharp object scratch. Like i said its not huge its like the "}" key on your computer keyboard but scratched into the screen...about the same size. When you look from the side and not directly down you can see the light on the plastic bend in on the surface. I see something mentioning toothpaste or lemon polish, but idk i've tried toothpaste on scratched cd's and it didnt help.
Don't use toothpaste. Most toothpaste is abrasive and may leave area where you rub it looking cloudy. I'm not sure what the lemon polish would do....
I suggest you just clean the screen. This will not get rid of the scratch but may make it less noticeable. You can also get a screen protector to prevent further damage to the screen.