For the Digitone itself, it pretty much dissipated completely over time. I never did get it out of the power cord though, but I also never tried any of the more thorough methods that others had suggested – like storing it in an enclosed box with crumpled newspaper or baking soda or coffee grounds.
Ultimately I did not keep the Digitone but the smell didn’t factor into that decision. 
Coffee is used in perfume tasting to reset the sense of smell. Maybe try leaving the item in middle of a coffee beans bag for some hours 
Sometimes, mostly weekends, my DN stinks because I haven’t showered!
I didn’t have my glasses on, so I initially read, “Best way to remove smells from my Dingo”
perfume tasting!!! 
- not a job I’d want.
borrowed joke [from the masters]
If it works for Pioneer…? 
So now my device will smell like coffee instead? Pick your poison I guess 
Or maybe it won’t stick like perfume does?
I dont think coffee would stick around like that, and even if it did probably more pleasant lol