I bought a smokers car that made me nauseous driving it. It’s like the owner smoked with all the windows up. I did tons of cleaning - like vacuuming with a Dyson stick with the little rotating brush, spraying and wiping everything. I’ve done the bombs like ozium and meguiars, and bought an ozone machine off Amazon. The smell is so much better and have even gotten comments that it smells like a new car which to me is still slightly smokey. I want to use my upholstery cleaner on the carpet but I’ve been too lazy since the smell is mostly gone and doesn’t bother me anymore. Repeated two hour ozone treatments I think work the best out of any other methods I tried. People suck oziums ass but I think that shit sucks and only masks the smell and it smells terrible.