last week I used provent a mite for my bp. When I used it, I took the substrate out, sprayed down the tub, let it dry, then replaced the substrate. Its been five days and the mite problem is noticably better, but I still see a couple crawling around if I look hard. Before I sprayed, I saw them on him just by looking in the cage but now I have to actually pick him up and check his entire body before I see one so its definitely better. I am thinking about changing the substrate and giving the new substrate a spray. Would this be ok, or should I just wait more because the provent a mite is doing its job? Basically, how long does it take provent a mite to get rid of mites completely?