After removing the cover, removing the scroll wheel will allow access to the springs and the wheel itself.
Hold the mouse in your hand so that the bottom side is facing upward.
Locate the #1 screw towards the bottom half of the mouse.
Take the 4.76 mm Phillips screwdriver and unscrew the #1 screw that was previously located.
Place the mouse back on the hard surface, with the bottom side touching the hard surface.
Gently, lift up the top cover of the mouse and remove.
Locate the scroll wheel on the mouse.
Grab the scroll wheel with your thumb and index finger.
Gently lift up to remove the scroll wheel from the mouse.