From what I understand the Natural is a sodium based spray that kills mites by dehydration. Think salt on a slug. It can be dangerous because obviously it will salt the snake as well but at such a smaller concentration. But I seriously doubt you killed it with the Natural without direct contact. If your snake was seriously dehydrated I'd expect it to jump in it's dish. I sprayed my new Viper Boa without seeing a mite and she jumped in her dish afterwards so I knew she was good. Now Viper Boas live in their dish and I'm not experienced with your species but.......... I wouldn't beat myself up if I were you. I don't think the Natural spray would kill a snake without direct contact and without a LOT of direct contact to boot.