Because you mentioned mites, I researched them and just took a good look at my snakes... (I do this 5 days a week, but just being extra careful) and everything seems clear. My snakes both poop once a week, usually the day after I feed them and I spot clean their bedding as needed, and fully clean their cages every 3 months. BUT I am going to triple check and put my snakes on paper towels to make sure no critters are there...