Has anyone used diatomaceous earth food grade for de fleaing your home, I have been given a sofa that I think has got fleas so I want to fumigate it, I have used a chemical flea spray but I want to make sure it is fairly flea free as the seats and back are hollow fibre they are just to big to wash even if I could I wouldn’t be able to lift it, I was wondering if anyone had any other ideas on what I can do to be sure.