Carefully measure the position of the screen withing the frame. You will need to place the new screen in exactly the same place, or the tablet will not fit back together.

Now using the heat gun or hairdryer on high, heat the edges of the screen in order to melt the adhesive holding the screen to the casing of the tablet.

When placing the new digitizer in the frame, you need to position it exactly. Do a dry fit without adhesive first, so you know how tight it has to be. The screen must press firmly into the rubber surround on all sides. If you place it loosely in one corner, the screen will not fit in to the other corner.