you haven't used it yet? I don't know how you stand the suspense!
Charge it up, leave c/u on, don't have to put anything in it. Turn it on and set to high, let it get to temp and go to auto shutoff. Remove c/u, let it cool. Five minutes for all of the above. If you want to be super thorough, repeat the steps once. There will be very faint factory traces of smell, and maybe even faint taste in your first bowl or two that will go away quickly.
So, you only need to be concerned if it smells bad from the burnoff or taste is bad, but chances are extremeley good that all will be fine.
For the adapter, to be careful you could drop into some iso alcohol (preferably the 99%, or if 91% use a little dish detergent afterwards and water rinse.You'll want the iso around for future Mighty cleaning.)
With Mighty I tend to call the burnoff optional, since they are a very thorough, tech minded GERMAN factory.
Now, get on with it!