I used the spen applying a little pressure to the UDC and since then when I press this point on the screen with the horizontal lines of my nails appear white green and pink. This only happens when I push it. Do I have a problem with spen? Do I have to give it for service?
Why would you want to purposely want to try and damage the screen. The part that has the camera has no support behind it so the camera can see through that area. By purposely pushing on that part the screen, you've probably damaged the outer part that's putting excess pressure on the pixels Best thing is to stop pushing your fingernail into it, otherwise you'd end up needed a new screen