Yep.... generally I would only use TOD for treating mites, but any insecticide can prove fatal to snakes if they inhale / ingest it. Generally larger snakes get over minor doses, saying that, it could leave permanent damage to various organs so treatment has to be carried out with extreme caution. I would treat a snake by sprayig onto my hands and rubbing over the snakes body apposed to "spraying" directly onto the snake, then wash the snake in water, reptile mites die readily on contact with insecticides, it's their eggs that are the tricky part. I would also tub the snake for a couple of months whilst treating and use something harsher for the enclosure, but leaving it sit unoccupied for a few weeks and getting numerous washouts with soapy water before putting anything back into it....