Walter's friend has a laptop that's been in storage needs to be cleaned out…because there's roaches in it! Leo says that's a strange issue. His first thought is to turn the laptop on and let the heat of the laptop force them out. He tried using some industrial strength bug spray in a ziplock, but it didn't work.
Doctor Mom in the chatroom suggests using dry ice, as that will push out all the oxygen and replace it with carbon dioxide, killing them. Leo says while that's a great option, if they don't have a way to get out, they'll be stuck and dead inside. But then he could open up the laptop and remove the carcasses.
Leo says that he'll have to make sure he has a way to pool any condensation so it doesn't collect on the laptop itself. He could use a sealed box with the dry ice above it. The C02 will settle and kill them. He'll want to look for eggs as well.
Mark in California says using a vaccum seal bag will kill them.