Ant problem?

hmm, sonds like a problem. I dont beleave the ants will bother your geckos though. I would lay a plate out with suger in the center and borax around the suger, the borax is a hand soap that acts like an acid to the exoskeleton of the ant, it will kill them. cayon pepper works as a repelant also. id go as far as to line the area around the gecko food to kill them off and repel them