I also think your roommate should provide sources to back up his insisting need to Bomb the place. Cause bombing is less effective than a number of other options not to mention less dangerous for other life in the house including human and pet.
I understand the thought of living with fleas is torturous and bombing seems the quickest easiest way (I jumped to that conclusion too once) but I assure it’s not the best, for the fleas or for the living animals in your house including you and your roommate. Far from it.
Thats what I told him... and I cant say were living with fleas because he only saw one on her head and one on his bed.
This was after we stopped treating her with flea medication... We stopped for like 6 months maybe even more