Thanks. I took away their water source and added a tall jar of apple cider vinegar and dish soap combo w a plastic wrap lid to draw all the gnats away. It worked.
This is my second batch of mealworms. First order (2K) pupated and huge black ants carried them off one by one. Then after moving my bin the humidity killed most of the others. The Beatles that survived were not Mealworm Beatles but a small sub species which I found out after pampering a bunch...