The only way to get rid of mites is to use poison. The other ways like soaking and covering with oils (which I don't think is good for the snake anyway) is only a temporary measure, it will kill a lot of mites but it won't get them all and then you'll be re-infested over and over and over again. The ONLY way that I know of to eradicate a mite infestation is to use poisons like Provent-a-mite or nix or repel.