Adhesive makes everything harder. I chose to replace the adheasive on my 6s plus during a battery replacement, and it was easily the hardest part. No fault of Ifixit or this guide… the instructions above are spot on. But the cleaning of the adheasive takes forever, easily tripled my total repair time. And its really, really nerve racking to place the new adheasive. I do stuff like that all the time, but this was nuts. The strips are so tiny and delicate! Be really, really careful and take your time. This earns its “moderate” difficulty and then some.