I have a Miele dishwasher. Not only is there no place to put prewash powder, but I can hear the little door for the detergent pop open like 2 minutes into the cycle when on the default program.

This dishwasher also came with a box of Miele pods (and they encourage you to buy more). I think it's designed first and foremost to not use powder.

>This dishwasher also came with a box of Miele pods (and they encourage you to buy more).

This is because the profit margin on them is much, much fatter. Miele still makes powder if you want to use theirs.