After much testing and consideration, we’ve come to the conclusion that German pillows are just not properly designed. The first problem is that German pillows are gigantic squares, which lead to only one of two possible sleeping positions.
With Position A, your body is in a normal sleeping position, but your feet dangle off the end of the bed because you’ve wasted a meter of space above your head. Whereas Position B requires that you climb to the top of the pillow, and rest your body awkwardly on the entire thing. Neither are desirable.
Secondly, the stuffing is allowed to roam around freely. This creates the following example height (or firmness) map for any given day.
Before going to bed, you have to shuffle all the padding into a uniform density. But it doesn’t really matter what you do here; by morning, your head will be in a valley.
The only way to fix this, to any reasonable degree, is to convert your German pillow to an American one.
This isn’t ideal, because it makes the pillow too thick. But at least now you can sleep.