What are you dusting with? Personally I like crickets the best as far as commercial feeders go. Some other commercial feeders would be roaches and flies. You can get blue bottle flies. Every chameleon goes insane for them!!! I feed them the dry honey/bee pollen mix along with fruit juices. I also dust them with spirulina to improve the nutrition. You can get them at a few places.
Besides that you can go and catch wild caught bugs. Make sure you arent collecting poisonous bugs, know what you are feeding off and collecting in a pesticide free area. Bugs I feed off are various species of spiders (wolf, crab, orb weavers, daddy long leg etc.), hoppers but not lubbers, moths, mantis etc.