Useless item
What should i use then? Someone recommend using Charcoal/Carbon Air purifier or activated carbon cabin filter ...but cant find one in Pakistan
For permanent cigarette, food and other smells, I have tried car air purifier from Sharp. Works quite well for the cigarette and food smells. They go away in 15-20 mins. It is quite expensive though, but also takes care of bacteria and viruses.
That 'new car smell' will only go away with time once the materials cure fully. nothing you apply can remove them. What you can do is park the car with windows rolled down a little to speed up the process. If you have your own garage you can leave the windows down
Not a great idea to leave the windows down in the garage in our dusty environment. At least not for extended periods. Will require a lot of interior cleaning for fine dust.
You can cover the windows with a cloth. It will allow air exchange and keep out dust