Yeah, only put enough in that it is eaten within a few hours or maybe a day. I keep my bug bins in the same room as the chameleons, so I just stop in the kitchen, grab a handful (I have so many bugs its usually a bag-full of veggies/fruits that I tossed together previously, but with only a small colony, it shouldnt really be more than a handful) of whatever I need and toss it into the bug bins. I usually let them eat while i do whatever else I need to (cleaning, health inspections, filling drippers, etc.) then I gather the bugs to feed off after they have eaten a bit of it.