white spots/haze/blob on touch-capable screen

A white blob/haze/spots is present on my convertible's screen (Samsung ATIV 700T Smart PC Pro). It appears more prominently if the screen is displaying white and they are present only near the screen's edges. (refer to pic).


Based on my research, those are caused by pressure applied to the screen. I'm the second owner of this device so I have no track record on how it was handled before I acquired it. It's just a little dubious that the screen would end up like that because it's designed for touch input.

Pls. share your thoughts and advice on how to fix it.