I'm freaking out because our dog got fleas, and in my panic to eradicate the fleas I doused the dog in DE, twice and then stripped the couch and washed the covers and spread DE on the couch and on the dog bed and now...it's everywhere. My black dog is a dusty grey colour and I can feel the stuff in the air. AH! I read that I shouldn't vacuum it up unless my vacuum has a HEPA filter, which it doesn't. AH! But I was thinking I should vacuum it off my couch...WHAT DO I DO??!! Naked in an asbestos suit, open all the windows and vacuum anyways?