The next three steps show how to apply new adhesive and install your replacement battery.

Use the flat end of your spudger to scrape an edge of the old adhesive into a ball large enough to grip with a pair of tweezers.

Use tweezers or your fingers to peel and remove the old adhesive from the frame.

Apply a few drops of highly-concentrated isopropyl alcohol (over 90%) to any adhesive residue and wipe it with a lint-free or microfiber cloth.