I got this problem too with my old car, one day i just got fed up i buy a tin of mosquito spray H2O based a.k.a water based and spray the whole tin of it inside my car and let the air con circulate as well incase they were hiding inside, after finishing the whole tin i left it over night, next day, air the whole car for a day. Most effective way, never seen those sucka ever again. Sacrifice a bit and bear the smell for few days but it got the job done...kekeke

Transnational not that clean also, i bought vip tickets and got those single seat one, the in bus entertainment is smacking roaches all the way to Ipoh =.= so many, smack for two hours still got some more coming out.

i usually spray them and watch them die, if it don't die i will smack it...kekeke i hate roaches always give the foul smell when they are around.