The are yellowish to begin with, but if you want to be certain...then wait a bit and the infertile eggs will begin to mold and then you will know :) The container will be fine...alot of people use different things to lay them in such as vermiculite. As far as the turning...they mean turning the...
The roaches flying? If we are talking about Dubia...they don't fly at all. I absolutely love my Duiba as feeders...no smell, not loud at all, and best of all better for my chams! When I first started using them...I started by using gloves and now I don't care :p