Not completely. I gave it a good cleaning with some Dawn dish soap and used it the next morning. While it did build a better lather for the first pass, the second was very thin. I used it again this morning loading it with a good amount of Simpsons shaving cream and found that it built a good lather for the first pass, but there was hardly any left for a second.
Then I loaded it with some leftover soap I keep in a mug and it produced enough for a good second and third pass. So it might be the cream that the Duke doesn't work well with though my other badgers have no problem. When I move on another soap I'll try the Duke out again.