Are they little black stinky ant? Argentine ants? if so, they are hard to get rid of, they are trying to find water/moisture, the baits we got did not work at all, we bombed which made it 100x worse, there is a spray my dads tenant buys for around 8.00 a can and it works wonders but I dont know the name of it, sorry, I will try to remember to get the name for you.