If you are going to replace the screen adhesive, follow these steps:

Apply a few drops of high-concentration (90% or higher) isopropyl alcohol to the adhesive.

Use a cotton swab or the flat end of a spudger to scrape away the adhesive.

Use a lint-free cloth or coffee filter to wipe away any remaining adhesive.

Allow the surface to dry completely before applying replacement adhesive.

Apply new adhesive strips or pre-cut adhesive to the frame where the old screen adhesive was located.