I too have heard really good things about that that reptile spray. Are you sure its snake mites? Or could it be wood mites just in the substrate? I think its rather rare to get mites from substrate, at least I never did. From what I have read, seems reptile expos/shows are the most common place to get snake mites, thus why I never go to them. Anyways, good luck and be sure to treat outside the cage too. If it is snake mites, they wont only be on the snake and inside the cage, they will be outside the cage in any carpet, drapes or furniture possibly.