I have used the No Pest strips years ago. However, I never did break off pieces and place them in the enclosure. We just put the whole strip on a shelf in the snake room, and let it work like that. With that said, I never did use it in the treatment of mites, but did attempt to kill some rodent lice with it. It did not work. What it did do was kill every roack, cricket, spider and insect in the room for many months.
Sorry I couldn't be of more help.