The best thing to do, I think, is to figure out what's attracting them and remove that, before you even try getting rid of them, because otherwise more will come right back again. Or to seal the hole they're coming in through, but that's a tough one since ants could come through such a small space.
I had ants almost chronically when I lived in Southern California; I think many people there do, although few will admit it. When winters don't freeze, there's nothing to kill them off. After awhile, I discovered that whoever lived there before me had somehow dropped a piece of what looked like extremely moldy and decomposed cookie into the heater (toddlers, maybe? :LOL ) and that's what was attracting them. Got rid of that, and it helped the problem a lot.
Could there be something attracting them?
me , he , my three , , and -- and the one we lost