Agree with William Stein above. Skip Steps 17-22. Simply secure the top of your phone with a rubber band to something sturdy. A 14 oz. can of kidney beans will do. I followed all of the other directions and the repair went smoothly and I didn’t lose Touch ID functionality. It was not necessary to heat my phone to remove the adhesive strips. I simply gently stretched and continually pulled at the base of the adhesive strip. Was rather surprised at how easy it was. Hardest part is re-attaching the home button cable connector and re-inserting the Touch ID cable bracket. When it’s time to reassemble those parts, be sure to go back through Steps 9-12, reading all of the comments for helpful tips. Used a Disney-Pixar-like desk lamp for good lighting and, also, the back of a refrigerator magnet to place the screws while working.