I've been having this horrible flea problem that I told you guys about with my poor cat. We dusted him with DE and boy, let me tell you, it WORKS. I wonder if that might help your mite problem? The wood ash smothers the buggies, the DE cuts through their exosceletons and then they dehydrate to death. It might be another additon to your kill the mites arsenal! I don't think I'd use it as a preventative, I think the wood ash is much better for that, and certainly cheaper, but as a solution to an existing problem it might be more effective. It's certainly worked great on the cat!