[cinntaile]

If you wash by hand you create a lot of friction so I wouldn't underestimate it. You'll likely also have less detergent residue on your dishes if you wash by hand, which apparently could be good for keeping your gut lining intact.

[SergeAx]

While all these are valid points, you just have to compare hand- and machine-washed glasses once and will never confuse them again. I believe that standard machine cycle includes enough rinsing to wash off detergent, but you may do another rinse just in case.

[cinntaile]

If I want squeaky-clean glasses, I clean them by hand so I can't say that I relate to your experience. Perhaps the dishwashing detergent that you use contains different chemicals.

[TeMPOraL]

Might also be because people misuse the dishwasher a lot - by overloading the machine past capacity, and then running an underpowered (or "eco") program. All those other programs are on the dishwasher for a reason, and it's not to trick the user into wasting more water.

[Scoundreller]

Another mistake is thinking the 1h cycle is the most efficient. It is not. Uses more water and electricity than a normal cycle.