I did that, I saw one black dot, which was so tiny to determine if it is a bug or just something from substrate. I don't see how she could have got it so sudden. Only thing that was introduced was a hedgehog that was in the other room. Didn't touch other snakes from other places or anything. Could mites be produced by itself in the enclosure? my knowledge is that it has to be transferred from other host which I doubt because I wasn't in contact with other snake. As for now, she is not soaking but just in the hide.