What you’re probably seeing are food mites. While they typically won’t harm your hermit crab, they can be annoying and gross looking. To get rid of them, you’ll have to follow the steps outlined above for the enclosure cleaning. If you do see tiny bugs in the enclosure, be sure to closely inspect all of your hermit crabs to make sure they aren’t infected with mites as well. Try to follow a strict cleaning procedure to prevent another infestation of food mites.