Before installing or gluing down any new components, remove any remaining adhesive residue from your device.

Peel off larger pieces of adhesive using tweezers or gloved fingers.

Scrape away any remaining adhesive with a plastic tool, and clean the underlying areas with adhesive remover or isopropyl alcohol. Wipe in one direction, not back and forth, until all the adhesive residue is gone.

This can take quite a bit of work, so be patient.

When your device is clean and dry, go ahead and install your new part and reassemble your device.