Originally Posted by airforceret
I have not a clue as to the science of it... it was shared with us 40 years ago and we've yet to have mold or musty in the fridge or freezer, and we leave food in our camper all summer till it goes to winter storage, so it's something we've continued to do over the years. Every couple of years we'll swap out the old for some new.
I'll give it a try. If nothing else it sure works great in absorbing the smells.