Use an iOpener to heat the lower edge of the iPad.

Insert an opening pick or a halberd spudger blade 1/4" into the lower right corner of the iPad.

Slide the opening pick along the lower edge of the iPad, stopping short about 1/2" before reaching the home button.

Each lower corner has a thick patch of adhesive, but there is also a delicate flex cable. Don't slice deeper than 1/4" around the corner to prevent damaging the flex cable.