In my research for parazap I learned a lot about holistic medications in general. First off, don't listen to the claim that "all natural" means no side effects, no ill effects, or no possibility of harm. After all, how many drugs are derived from "all natural products". The generalization however, is that most of these holistic compounds are in dilute enough concentrations where haphazard use is still safe.
As for the ingredients, it may be a little irritating, but probably not much better or worse than polysporin. More often than not, surface wounds do better uncovered, but that's a problem specific statement.
The statement that there are no toxins of any kind, well, that's based on toxicity in humans. Holistic medications are not required to thoroughly test themselves with long term trials.
Usefullness on mites; likely equivilant to using mineral oil. Take it as is I guess. The bacteria harbouring organic waste, well, I'm sure lubing up your snake in oil will make it easier to clearn and wipe off debris too. 
That's my take on the product anyways!
Ian