How to Remove strong Smoke odors in a room ?

[Pavel K.]

Hi all. Hoping I can get advice on how to eliminate strong smoke odors in a bathroom. We repainted the bath, cleaned out the bath ventilation fan, pretty much addressed anything that we could cosmetically. Also tried a 70$ ozone odor eliminator from Amazon which we ran several times. After running it the smell did disappear but it was only temporary. The next day the odor returned again even though we re ran the ozone machine again. Does anyone have any recommendations how to address this problem ?