Translating step 4
Use tweezers to peel away the adhesive left by the rear camera bezel.
Use a spudger to scrape away any remaining adhesive where the camera bezel adheres to the rear glass.
Clean the adhesion area with high concentration isopropyl alcohol (at least 90%) and a lint-free cloth. Swipe in one direction only, not back and forth. This will help prep the surface for the new adhesive.