There's another way, that doesn't require heat or cold, which worked for me when we ended up with bed-bugs. Wrap everything that could be infected in polyethyl

There's another way, that doesn't require heat or cold, which worked for me when we ended up with bed-bugs. Wrap everything that could be infected in polyethylene sheeting - and include a few sachets of ascorbic acid in there - you can get it online or from a pharmacy typically. Make it air-tight - like, really, really air-tight. Cling-film around the plastic sheeting can make an extra barrier. Leave it for a few months. When you unwrap, you'll end up with soft pitter-patter of little asphyxiated carcasses, and your infestation is over.