I bought a pair of speakers on Craigslist that turned out to have little roaches living inside. Fortunately, I noticed them before any escaped into my apartment, so I took the speakers back to the trunk of my car immediately. Then I sprayed raid all over the inside of my trunk and a liberal amount inside the speaker cabinet.
I've looked inside the trunk a couple times over the last 2 days and haven't seen any live roaches inside the cabinets or elsewhere. But before I take them back inside, I need to know that the roaches are all dead and that there are no eggs inside that can hatch. So how can you be sure?