I'm of the opinion that you shouldn't use PAM unless you know that you have mites. PAM is really nasty stuff. (Why drop an A-bomb when a grenade will do the job?)

For use as a preventative measure or a just in case measure I would use this, it is safe enough that it can be applied to the animal directly and will give you some piece of mind.

http://www.reptilebasics.com/reptile-relief-8-oz.

Now if you have a confirmed case of mites then yes nothing works better than PAM and it should be what you use.