If you do use DE, make SURE it's food grade. But all it does is dry things out. Unless you're in a humid climate. If that's the case, the stuff will soak up moisture from the air and be rendered useless. The kind with the sharp edges is the pool grade stuff. This is very dangerous to use. Imagine feeding chickens with ground glass. If food grade DE really did kill bugs with sharp edges, then it would be, in effect, ground glass. It has been heat treated and this treatment causes the sharp edges. But I'd imagine breathing anything is not good for the lungs.