Getting Out Odors in Vintage Costume Jewelry

I recently received an email asking for the best way to get out a smoke odor from a piece of vintage jewelry. There are several methods I know are successful for the patient collector.

First: Be cautious of any wet cleaning you do. Moisture is the number one reason for rhinestone damage. Although, I've heard of cleaning methods that supposedly would not damage your stones, I do not recommend them. Over time, moisture damages the foil on rhinestones so the tiniest bit of trapped moisture could turn your rhinestones dark months later. Never use any commercial fine jewelry cleaning solutions on vintage costume jewelry.

What I've tried:

The most reliable method I've found so far is to put about a cup of unused coffee grounds in a coffee filter. Put your jewelry in another coffee filter. Stack them on top of each other (jewelry on the top) and place in a brown paper bag or a shoe box. Check on it in a week, really strong odors may take two weeks. Change the coffee grounds if needed.

You can also use the more expensive odor reducing cat litter in this same way. Just remember to use the coffee filters or a soft cloth to separate your jewelry from the cat litter. Cat litter is abrasive and you don't want it scratching up your jewelry.

What I've never tried:

I've heard of people who wrapped pieces of costume jewelry in dryer sheets and put them in a brown paper bag for a week. I'm not crazy about this method as it seems like it would leave a film on jewelry and I'm personally not crazy about the smell of dryer sheets. If you have sensitivity to dryer sheets, perfumes, etc, this is probably not the best idea for you.

Cedar chips in a potpourri bag.

Charcoal pieces.

What have you tried that worked?
What have you tried that didn't?