I was wondering if I could create humidity in my enclosure by filling a jar with water and poking some small holes in the lid. I know many ppl just use damp coir. The reason I do not want to do this if I can avoid it is because I have a millipede cage that I keep moist and it is a source of concern every summer. I get a crap-ton of small black flies with their wormlike maggots and grain mites and swarms of fruit flies (I swear I inhale thousands ). So I don't want another cage where these nuisances can spread.
Also, if this idea is viable, will the roaches still breed with ambient humidity or do the ooth need to be in contact with a wet source? Thank you.