I use Hot Shot Ant and Roach spray. It only lasts a day, but my girls are fine with it. Costs about $3 at the Family Dollar store. It also has a germicide. Side benefit. I even spray the food with it when they raid my meal worms in the feeder. Has not had any bad effects on my girls. They seem to like the lemon scented, but both are good. Just remember to spray the feeding area about 5 minutes before feeding, and the ants stay away for the day.