Interesting, that makes sense. I lived in an apartment with 8 units back in my exterminator days, and my landlord was more than happy to let me in to all 8 of them to do a thorough spray.
It was much harder to spray apartment complexes with hundreds of units and treating for roaches in every single unit was prohibitively expensive (or my boss was a cheapskate, I don’t know), so we’d only do targeted treatment where we had seen roaches and surrounding units.
Single family homes were much easier to treat. I strongly suspect we got roaches in our single family house when a home care nurse brought them with her, along with a bed bug! I almost died when I saw that monstrosity, luckily we avoided an infestation, those are 10x worse than any cockroach. You do not want bed bugs.
It was much harder to spray apartment complexes with hundreds of units and treating for roaches in every single unit was prohibitively expensive (or my boss was a cheapskate, I don’t know), so we’d only do targeted treatment where we had seen roaches and surrounding units.
Single family homes were much easier to treat. I strongly suspect we got roaches in our single family house when a home care nurse brought them with her, along with a bed bug! I almost died when I saw that monstrosity, luckily we avoided an infestation, those are 10x worse than any cockroach. You do not want bed bugs.