Same experience, but with used down jackets.
I renovated an Old House a few years ago and used an ozone generator to “treat” the old house smell when I replaced wallboards, etc. Worked like a charm, so I figured I’d give it a go on a ciggy down jacket.
So I put the ozone generator in an empty box out in the garage, with the jacket, turned it on, and left for the day.
Came back many hours later (after a long hike). It worked great, cig smell was barely detectable.
And the elastic cuffs, hem, and hood aperture were all fried. Too much ozone.
I repeated again with another jacket that had a cig smell to it, and instead cycled it:
* 30 minutes of ozone treatment, quick wash cycle, repeat
I did this 3 times, no damage to the fabrics or elastics, and came out smelling pretty good. Not perfect, but 90% better and certainly wearable for me (a non-smoker).
I christened it with some campfire smell the first time I used it, and it was good to go from there :)
I have this one.