First, scratch a corner with fingernails. And then slowly tear down the film along corner. I suggest you take it to professional place to handle because it will look ugly if you stick the film up again after tearing it down.
As far as I know, the method to remove the computer film is: General protective film has more than one layer, so you can pry one side of the well-sticked protective?film from a corner of the screen with a layer of film which is not to be used, and then pull the film with your hand. If you want to continue to use the protective film, pay attention not to touch the sticky surface of the protective film with your fingers, or it will be sticked with fingerprints which are difficult to remove, affecting the vision after being sticked up. The above is my personal experience,
It usually doesn't need any particular method to tear down computer screen film. You can tear from a certain angle, and then gradually exert strength to tear down the whole film. If you encounter some films which are not easy to tear down, heat the screen and the film with a electric?hair?drier for not more than 3 min, and then you can easily peel the film off.
