My mealworms haven't been so sensitive, but who knows... Yeah the mites... oh man!!! Our air had gone out for 2 days last summer, and I had a culture with the beetles seperated from the worms, and of course with the beetles its harder to clean cause you are afraid you will accidently throw out some baby worms or eggs... so it was pretty moist in there, and the next morning of having the air out they just were on EVERYTHING in that room.... It was INSANE...... I moved out all of my creatures into another room, and dry iced the terrariums.... flea bombed the room... eventually put everything back in... and then after reading the recommendation of waiting 3 months before trying to start a new culture, I did.. They were back, but at least I recognized them and they were contained... I dumped my culture, and now I just buy mealworms for my frogs and newts and dont even try to breed them.... It seems hopeless, like they are in this room forever or something!