Before installing new adhesive, thoroughly clean the display assembly and the frame of all residue.

Use tweezers to pull up sections of tape residue.

Use an opening tool or a spudger to scrape residue off. You can use high concentration (over 90%) isopropyl alcohol to soften the adhesive.

Remove the residue by wiping in one direction to prevent smearing.

Do not scrape with a metal tool, or you will scratch the display assembly's surface.