I recently had bed-bugs and it's very strange that you aren't being bitten. My infestation was so small that we didn't actually see them but we were getting bitten nightly. The only way I could prove I had them after a couple weeks was there was ONE dead one in my bed after a couple weeks.
Bed bugs are hearty things, the only thing that took care of the problem was professional heat treatment. They raised the temperature of my apartment to >150 degrees for four hours. It was a huge pain in the ass.
So ask the landlord to raise the temperature to 150 degress and it will kill all the bed bugs in one day ? how do i know if the exterminator treatment is working or not?