For my birthday 3 months ago I received a cute little Renault French crock with a lid. I'd like to store salt flakes in it but I can not get rid of the lingering potpourri scent. I think the shop where it was sold must have displayed it with a bag of potpourri inside.
I've washed it repeatedly, left the lid off for weeks and but every time I put the lid on the smell comes back. It's salt-glazed stoneware. Can I put baking soda or vinegar or something else in it? I've searched around and haven't seen any definitive answers. Chemistry is not my forte.