One group talked about using "hexane," an iPhone screen cleaner. Hexane evaporates faster than other screen cleaners, which allows the production line to go faster. Hexane is also a neuro-toxin. The hands of the workers who tell him about it shake uncontrollably.
Some workers can no longer work because their hands have been destroyed by doing the same thing hundreds of thousands of times over many years (mega-carpal-tunnel). This could have been avoided if the workers had merely shifted jobs. Once the workers' hands no longer work, obviously, they're canned.
One man got his hand crushed in a metal press at Foxconn. Foxconn did not give him medical attention. When the man's hand healed, it no longer worked. So they fired him. (Fortunately, the man was able to get a new job, at a wood-working plant. The hours are much better there, he says — only 70 hours a week).
The man, by the way, made the metal casings of iPads at Foxconn. Daisey showed him his iPad. The man had never seen one before. He held it and played with it. He said it was "magic."