have worked their way up. The building has experienced alot of turnover over the last couple of years, so I attribute it to that, but one can never be for sure. I have since bleached all the areas where I found them and put down boric acid all around in the corners.
I found a lawn and garden pesticide that has a chemical to kill them. I am going to use that next.
Forget the landlord - he is cheap and wont spend the money. I could pay someone to do my room but its moot if the whole building isnt treated.
So I am going to have an ongoing battle with these things.