Pull up on the suction cup with firm, constant pressure to create a slight gap between the screen and the metal frame.

A plastic bezel is secured to the underside of the display, and needs to lift up with the display. Inserting a pick between the bezel and the display will damage the panel.

Insert an opening pick into the gap under the screen and the plastic bezel, not the screen itself.

Make sure to insert the opening pick under the thick plastic bezel to avoid damaging your screen. You should see a visual gap, and the pick shouldn't catch on anything. If you can't see the gap, you'll need to pull the screen up more.

The watertight adhesive holding the screen in place is very strong; creating this initial gap takes a significant amount of force. If you're having a hard time opening a gap, apply more heat, and gently rock the screen up and down to weaken the adhesive until you create enough of a gap to insert your tool.