Before reattaching the bezel, we have to apply new adhesive tape to the inside edge in place of the old adhesive. Before that, we have to remove the old adhesive

The easiest way is to use the flat end of a fresh spudger to scrape the adhesive away. If it's being stubborn, a quick few seconds with a heat gun makes things a whole lot easier.

Be careful to not warp the bezel with excessive heat.

Add new tape