Sir Miked, Sir Speed Unlimited,

Thanks for all your suggestions/advices. So far its been almost a month already and cant seem to find any ant anymore. So far what I did is I sprayed a little amount of insecticide in the interior and frequently on the area where my wheels sets on the floor (which is where i think the ants used to climb). I also tried thoroughly cleaning the interior, specially the under carpet areas and so far it's been successful.

Thanks for all your suggestions and tips, Chiefs! More power!