Ultimately - all of these guys are pretty annoying in cultures. Sometimes the best thing to do if it starts to get obnoxious is to simply tear the whole thing down and start fresh with new egg flats and a complete overhaul. You don't need new roaches, but a fresh (or freshly cleaned) bin and fresh decor, food, etc usually does the job.
i had a similar problem with my secondary bin (I'm a bit of a roach nerd, so I have a test bin where I experiment with temperature and diet prior to introducing it to my breeder colony). I put some prickly pear in there and left it in there probably a day too long. When you say fruit flies are annoying, you hit the nail on the head! I ended up just investing $6 in a new bin, pulling the roaches out pretty much one at a time, and moving them to the new bin. I already had mesh screen and duct tape so it wasn't a major hassle.

It worked out in the end because the new bin is opaque, and they seem to be much happier in there. Coincidentally that helped me with a new observation - my roaches are more freaked out from too much light than they are sound.