Does diatomacious earth work ? I and my animals are going crazy with this year's flea problem. I have sat for hours, combing out and killing fleas with haemostats, I've tried flea powder, even that systemic stuff from the vet doesn't work any more. I bathe my small dogs twice a week and I vacuum the house (and my bed) every day. I am picking up a large bag of DE tomorow. If anyone has any advice......please help.