Mite Problem(update) need more info....

So I have a can of "Black knight II mite killer" from pro-exotics on the way right now in the mail with 3 day delivery. How long does it take for mites to kill your snake? I'm kind of worried... Has anyone ever used BK? Everyone says it's great but I was just wondering form personal experiences. I've read I can spray it on the snake, will that HURT the snake?

Just remove all bedding and snake, clean the enclosure with a mild bleach solution. Put newspaper in the enclosure, use plastic hides, spray short bursts of the BK in the enclosure, wait 15-30 minutes for fumes to dissipate, then put snake and water bowl back in. I would not use it on the snake. Directions should be pretty straight forward.