If you are reusing the screen, this guide is too dangerous

1. You should heat the disaply evenly, not only at the right edge:

Using simple physics heating the display from all sideas will reduce the adhesive force of the glue overall, heating only one side will reduce the adhesive force on one side, thus you will need to use more force on the suction cup making things worse.

2. Start from bottom edge:

Most glue is present on bottom and top edges, also there is more space to insert the pick too cut the glue. It will give you more room to work on left and right edges where the gap is very less.

3. Don't use iopener

It's very hard to evenly heat the display with iopener. You basically heat one edge, run to the microwave to heat the iopener then place on the next edge, until then the first edge cools. Use hair dryer, or heat gun they heat the display evenly