Male whoosh cockroach producing a fragrance?

I'm 100% new to keeping cockroaches so I'm really sorry for being so ignorant on the matter; though I'm worried I'm doing something wrong. I picked up a few hissers from my local petstore; first I bought a male and female. A week later I bought another male; though they gave me a female dubia on accident due to it being in the same tank… I kept her 'cause she's cute. Since then the males have been getting a little… stinky. I've noticed they smell like b.o. Straight up sweat. I'm not sure why, I can't find any information on the matter. I'm scared I'm doing something wrong that's causing them harm. I'm keeping them in the same coconut fiber substrate I use for my BP's, it's always warm in my room for my pythons as well. I feed them lettus, any random fruit or veggies I have- and I change that out every other day so there's no mold. I also threw in some cat food and some bearded dragon food pellets because my beardie hates them and I assumed that'd be fine food. I'm keeping them as pets so I really do care about their well being; and when they have babies I'll likely feed some off or maybe start a colony if I'm ready for that. sorry for tl;dr… I'm really just hoping someone smarter than me can help me out. ahhhhh

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