Honestly, when my Monty got mites, he was in the water all the time. It got to the point where i was worried he would get scale rot he was in the water all the time. I used PAM once and hes good now. But, since you're using PAM i wouldn't worry about mites. It's probably just the humidity is low, or, ure ball is enjoying a little bathing time. Some just like the water.