I agree mostly with #2. Each emphasizes the individual element in a set (the action was warranted in that particular case), every emphasizes the set as a whole (the warrant is provided by the nature of the set itself).
"After each of these repairs, I tried to understand how the device had failed." -> emphasis on individual repair.
"After every one of these repairs, I tried to understand how the device had failed." -> emphasis on the fact that it had to be repaired at all.
Detective: "I want the names of each man the victim talked to at the bar before she died." -> the detective is going to look into each individual man.
Detective: "I want the names of every man the victim talked to at the bar before she died." -> the detective thinks that the victim is likely to have been killed by a man at the bar.
In the OP I would lean towards 'every', although in each individual case (or: every individual case presented here) both could be correct. I would say that something like "Wash after every use" and "Wash after each use" are both correct, but the latter sounds a bit more like 'Translated Instructions English.'
