From the thread at JJR's in which I asked about moving a computer monitor from a roach-infested rathole (which later burned down, but anyway) and suggested freezing it:
Freezing doesn't kill roaches. They can take being dropped into liquid nitrogen and then flashed alive via a microwave.
All of your major chemicals leave either an abrasive powder base that can screw up your sensitive case components or an oil film that is no better. The monitor and speakers are different. What you can do is get a smallish coat closet and pile in all of suspect material like speakers, monitor, microwave inside. Toss in one of those fog bombs and slam the door shut. Quickly slap a towel over the bottom door crack and then hit the side and top seams with box tape. Leave for a few hours so you don't suck in errant fumes. Leave it sealed up for two days. When you go retrieve it, you will see a dozen or so of the little bastards dead in there with your gear. Go buy a can of Roach Prufe... that deadly white doom powder, the boric acid stuff... its the nuclear weapon of anti roach. Dust all of the little hidden areas and edges and behind the fridge and stuff... all over. The droppings are the sure fire sign of where they like to accumulate. Egg sacks denote a current or old nest. Open up all of the drawers. Lift up silverware trays. Pull drawers and look inside the casing top and bottom. The little bastards are sneaky. I just hope there are no small animals about. The stuff is a powerful dehydrator. Anyone who lives there may notice a certain amount of headaches. Make it clear that they need to wash everything prior to ingestion as well as wash their hands. It takes a few weeks to see full effect... but the effect is dramatic. Anything like stereos or computer cases should be opened with a screwdriver if possible and just vaccumed out... compressed air... that kind of thing.
A cheaper method is to mix the washing powder '20 mule team borax' with a little confectioners sugar and dust with that. You can also make long term bait buscits with the same borax and some sweetened cocoa. Mix it up with a touch of water until it becomes a gritty paste. Spoon it out onto a cookie sheet or something to dry. Distribute these all over... where pets and little kids can't get them. One inside the stereo would do nicely as well. Pepper the nest if you can find it. They like to hide near the kitchen becuse of the food and water supply. If they have one of those wall inset ovens... look for a pop panel access panel and take a peek back there with a flashlight. Theres an awful large amount of comfy space back there that they seem to be safe in. Powder it. After 3 weeks, vaccum up as much of the loose powder as you can. Stuff behind the fridge can't be dealt with... oh well. At least kiddies can't get at it.
Happy hunting.
