Baking soda absorbs odors, if you could find a container to put it in and cover the machine along with the baking soda. It will probably take a few days, or maybe a week or two.
There are probably others with better ideas, too.
Also wipe it down as much as possible with a damp cloth and baking soda, getting into the nooks and crannies as best you can. Rinse the cloth in the baking soda water often.