Suction cup and hair dryer method never worked for me. Even tried my heat gun. Finger went numb before I gave up. Used thin prying + suction cup and eventually opened it but screen cracked in the process when I was too aggressive opening it.
In hind-sight, it would have been very helpful to know that the adhesive is just in the 2 areas to either side of the home button, nothing along the edges.
Biggest complaint is the time wasted, should have just bought a replacement iPod, better return on my money/time.