Originally Posted by jigtwins
Charcoal will absorb many odors. Just put a few pieces in a paper bag, and put it in the freezer. Shut the lid and let it sit for a day.
This. Some charcoal of the non "match light" variety.
I have put it in a pan, ( more than a few pieces, myself), and closed the unit with a small fan within, ( muffin fan works well), and left it a few days.
Works well. No need to spend the bucks for "activated charcoal".