I would go with the NIX treatment. It has the same pestecide that provent a mite has but it's at 1/2 the potency , the fact it's not in a areosol it can safely be used on the snake directly..
get a bottle of NIX shampoo at the pharmacy and a 4L of distilled water at the same time. Mix 1 bottle (they often sell in a two pack) so 1 ONE bottle in the water and you're ready to treat..
start by having another bin to put the snake in, spray the bin generousely add paper towels and spray them too and then spray the snake head to tail and don't be shy.. set him up in the in the bin for now.
remove all substrate and accessories clean and spray everything, add paper towels and spray them so they are wet with the solution.Add the hides.
At this point you should spray all around the cages/bins/rack, carpet all around the cage ( to kill wonderrers).
then take your snake, spray him again and set him up in the cage/bin.
NO WATER BOWL FOR 24H
"" IN FACT it's also a good idea to set your snake in a tub with 1" of water before treatment si it drinks.. ""
the first time you do this should erradicate them all, but do this twice more at 1 week interval..
thing is, if you have other reptiles, you will NEED to treat everyone of them at the SAME time. if you don't mites will seek the other ones and come back later .
NIX will also kill the mite eggs and can be used as a precautionnary treatment once in a while just to bee safe.
Many big breeders will treat on a regular basis, before and after a reptile shows.
It has a nice soapy smell to it, is safe , easy to use and way cheaper..
keep the unused solution in a dark cold place, doing this will give it a shelf life of 1 year.
not that provent-a-mite doesn't work !!! it does , but it's a pain to use and smells really strong, plus it's not safe to use on the snakes, this product was innitially black knight used in airports to spray bomb planes to kill possible parasites. The fumes are dangerous..
NIX and PAM have the same pesticide in it and at the dilution NIX is, it's safer and in a way more efficient then PAM because you can use it on the snake where many mites hide..
BOTH work one is just easier IMHO
and on a side note: if you serach the web, you will find ONE story of a girl who poisonned her snake with NIX
BUT she used a NIX cream that i've never seen before. we use the 1% solution she used the 5% and diluted it in 1L of water. add that it was just a baby snake

it died of poisoning..
with the 1% in 4L you get 0.25% active solution, PAM has 0.5 in a air spray..
test have been made using 100% potency of the 1% nix on adult snakes with no ill effect but who in their right mind would do this anyways..
YOU have options and both will work.. but whatever you chose, remember that unless you treat everything, everone at the same time, they will always sneak back..