PAM is a contact treatment, I would also suggest spraying some PAM on a paper towel so its wet with it, and take that and wipe it on the rim of the 10 gallon tank. this will kill any mits that get in the tank because they have walked across it, and it will also kill the mites that are leaving the tank to lay their eggs. being a contact treatment like I said, this will not effect your leapard geckos food source.

I would also use the bleach solution to do cleaning as rabernet suggested.