Last week, I got from my best friend her entire Sega Master System and Sega Genesis collection. All her SMS and half the Genny games are in their original plastic cases, but the problem is that the whole set has been exposed to years and years of cigarette smoke. We've started to try to reduce/remove the smell via different methods found online (ie. fabric softener sheet and eventually coffee grounds and baking soda -- the latter two NOT in direct contact with the games and consoles, obviously!)

Does anyone know whether we can safely do a mass washing of the plastic clamshell game cases (after removing the paper sleeves, of course!) in soapy dishwater, or would that kill the plastic sheet that hold the sleeves into place? It'd sure speed up the massive cleaning process if that were possible!