Remove mouse cursor from view in full scree window view

How can one remove the mouse from the window when full screen = True is set for the window settings?

experiment_window = visual.Window(size=(800, 600), winType='pyglet', fullscr=True, screen=0, monitor='testMonitor', color="black", colorSpace='rgb')

experiment_window.mouseVisible = False

For the instructions of my task, the mouse is not present. However, when the movie stimuli or rating scale are present, the mouse is again present. If I set the full screen to False, the start bar remains present during the experiment.