Today I had to finally clean our shed. Thing is, I found a mattress my previous roommate had left just leaning against the wall. It's been there for at least 4 months, along with other old furniture and trash. It's been about 30-40F the past several weeks.
I quickly checked for signs of bugs, but couldn't see any.
I doubt that roommate had a problem with BBs before, since they lived here for a year with no issues. Several months ago, I found and killed one bug crawling across the floor, but none of us have seen any signs at all since.
So my question is, is there a chance there could have been some living in the shed? It's doesn't seem likely but I guess they could have been living off biting animals or hiding in someone's trash, so I want to make sure.