Reptile Relief kills mites, but not their eggs. I also used Reptile Relief on a rescue, before I even brought her in the house. A month later, the eggs that were not killed by the Reptile Relief hatched and I had mites. Ordered Provent A Mite, and I've never had another mite. All new additions' enclosures are pre-treated with Provent A Mite as standard routine.