I am just starting small to repair phones and tablets to...
iPhone 6 Battery
Exceptionally detailed and clear guide.
I tried to clean off display adhesive right away upon opening. Found it’s much easier once the 4 connectors are detached and the display screen separated from the rest of the phone. As for the battery, OLED and digitizer cable connectors, a fingernail works best for me to catch the edges without harming the black silicone seal around each of the connectors. The spudger is a bit less precise and without the same tactile finesse.
Thanks, Jeff Suovanen.