I read it's not good for them to breath rubbing alcohol, and I don't know how that would help kill ants anyway. I always make some poison with sugar, water, and borax. I put some water in a small bowl. Then add a lot of sugar and a small amount of borax. Then heat in the microwave and stir it so it all dissolves. Put the bowl someplace where the ants will find it. The borax physically expands in the ant's body and destroys it. You can buy borax in the laundry section of the market. The ants carry the borax back to the hive and kill the queen. In a few days, the ants are all gone. Alternatively you cold put the poison in an open bottle instead of a bowl.