Which model was it that was so difficult to open with its glue and double sided tape?
The K4?
In none of the teardowns I read did the person try a heat gun (hair drier).
Some adhesives have a very low (compared to plastic melt) release temp.
Wave a little hot air at it, it might just fall open.
And at $0.76/hour - they could waste a few extra minutes on the re-work bench.
http://www.bgr.com/2012/09/06/iphone...conn-students/