Found this somewhere:
Turn off your monitor.
Get yourself a damp cloth, so that you won’t scratch the screen.
Apply pressure to the area where the stuck
pixel is. Try not to put pressure anywhere else, as this may trigger the creation of more stuck pixels.
While applying pressure, turn on your computer and screen.
Remove pressure and the stuck pixel should be gone.
This works because in a stuck pixel liquid in a subpixel has not spread equally. In combination with the backlight of your screen, this liquid is used to allow different amounts of light to pass through, which creates the different colors.
Final attempt should be:
Use a ball point pen and gently tap on the stuck pixel several times till it becomes normal. Several people have reported success with it. This has to be done AFTER removing any protective screen.
Don't over do it or apply too much pressure that it cracks your screen.
I am not responsible for anything. Do it only if there is no other alternative.
These tricks won't work on capacitive screens because it's surface is pure glass. In my case, the glass is a toughened glass (Gorilla Glass).