We recommend first trying Terro for ant problems. We have about 60 species of ants in Hawaii and all of them consume dew/sugar. Terro is effective and limits the amount of pesticides that need to be introduced for control. Terro can be purchased over the counter and no license is required.  The formulation that seems to work best is the gel form, which comes in a clear bottle and even has perforated tabs for placement on sensitive areas. The key is to place tiny droplets of the gel bait on the ant trail. The trail is marked by pheromones, which the ants will continue to travel on.