I checked monthly because I'm that cautious), and no one posted any signs--or else this whole mess could have been avoided! The landlord is not honest. When I first reported them, the landlord said I was the ONLY case in the building. That is a definite lie. I found out that other people had been dealing with them for at least 6 months prior. When I told the super about this he said it was "just New York" and "unavoidable" in a building that big and that they could have come from anywhere. Yeah, right! The apartment above mine was infested and had been treated for months! I only found out by seeking out my neighbors and quizzing them. One man even said, "Oh yeah! Everybody has them!" (referring to the building) -- though I only spoke to one or two people who confirmed--everyone else said they didn't. I have been treating my belongings diligently and had the apartment sprayed several times. I left the building--I didn't stick around only to get reinfested.