If you are talking about Permithryn-based products...there are TONS of different formulas out there with varying levels of toxicity. Again, if you can't list a specific product to be applied in a specific way, I wouldn't recommend it at all.

By what you've said, someone might think that it would be ok to go buy that product, and spray down the entire cage and contents, including the snake, water bowl, hides, etc, and could end up with dead mites...and a dead snake. I know that's probably not what you meant to say, but remember, what is common sense to you might be advanced knowledge to others...my experience on this forum has taught me that much