Be careful not to touch the lens covers on your rear cover. If they're dirty, wipe them with a clean and dry microfiber cloth.

If you're reusing your rear cover, remove any old adhesive:

If necessary, soften the adhesive near the camera bar with a heated iOpener or hair dryer.

Use your finger to roll the adhesive strips until you can grab them.

Peel the adhesive strips from the rear cover.