ATTENTION: Don’t screw in that one screw over the home button too much, or the button breaks! I just found one proper explanation for it in this YouTube video (https://www.youtube.com/watch?v=rDVnp90a...). Basically, that one screw that goes over the Home button should not be tightened too much, so that the metal plate doesn't bend (which it did for me).

I did just as you said. Cleaned a bit with alcohol. Then when trying my second adhesive I made sure it sticked to the battery PERFECTLY EVERYWHERE. Then removing the plastic SLOWLY making sure it doesn’t come up (It did once at the beginning but I continued anyway and just sticked back to the battery) Worked for me.