first, identify the "mites". Many things that look like mites can be harmless, while real mites are often underestimated. Springtails cannot bite, cannot sting, eat only microscopic biofilm, are harmless and near impossible to wipe out, but they are soft and when you manage to squeeze one against anything it just turns into a tiny smudge without resistance. And they are barely visible as black dots, but when your finger comes close they jump. Mites cannot jump, they stick to the snake and suck blood from the snake, and their bodies are hard, almost like a grain of sand. And if they break and the result is a red smudge, meaning it sucked blood, thats a problem.
Can you make pictures that show the issue? I know its hard because the mites, be they harmless or not, are small.
Best Regards
EDIT: are they active on the snakes? if yes, thats bad.