Unless you are doing quite regular sand changes and make sure you get any bits of poopies in the sand, it will start to smell. The more you change and more regularly you change it, the lower the smell. However, if, like me, you wish to keep herps as low maintenance pets (which I think is one of their advantages), then stick to tiles. They will settle, none of mine are on sand and none of them seem to care 2 hoots. They haven't said anything, anyway.
Forget the mite spray, unless you've got mites whats the use? It won't deodorise sand.
