Cigarette smoke in xps

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2nd hand...
I've tried airing it out with a fan.. Tried wiping all the surfaces with isopropyl alcohol, even took the back cover off and wiped what I could there, without getting things too wet..

But when it's running hot... the smell just comes back.. Even on the fingers from the keys. It seems that 'rubbery' finish on everything really keeps the scent..
Anyone got any great methods?

 

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Thanks for the suggestions.. Over time the smell has lessened.. I guess I'll try again with the alcohol but I'm not really willing to pull it all apart even if it's just a few hundred quid..