Flea collars, anti-insect gels and insect traps typically use an odorous toxic substance to kill the mites, but is also toxic to your snake.  Many snakes have horrible allergic reactions to these methods.  

Seriously, invest in a can of P.A.M. (Provent-a-mite) or get a Rx for Frontline from your vet, or go to Rite-Aid or other drug store and you can find children's lice remover, DILUTE IT, and use that.  If you go the Lice method, you'll want to find the one with Premethrin, and ensure that you dilute it to the same percentage as PAM (0.5% I believe).  You DON"T spray this directly on the burm.  Take the burm out of it's cage and store somewhere safe.  Sterilize the cage, and spray with the PAM.  Also spray newspaper or papertowels for substrate.  Allow these to dry and offgas a little before re-introducing your snake.  You can also pre-treat additional papers and store those in a cool dry place for future use.  Once they dry, there is little to no odor and they can be kept in a drawer or closet.  Personally, I withhold water for a day, just cause I'm AR and I want to ensure that everything is perfectly dry.  Once everything is dry, the PAM treated surfaces are absolutely no danger to getting wet if your snake still wants to soak.  Keep treating with the sprayed papers for a minimum of 6 weeks to ensure that all the eggs that could be stuck in a corner or edge are dead, but that should take care of your problem.  Hope this helps.

PS... if you also keep Inverts, make sure to remove them to a safe area of your house, PAM will kill ALL inverts, not just the bad ones

Ahh, just looked at Stanley's picture, I seriously also suggest getting rid of the floor carpet, it's not condusive to staying clean and is going to be a sponge for bacteria from urates and feces.  Go with newspaper for now, and later I suggest Aspen or Coir if you want something more natural looking.  Those will also help hold down the odor incase you can't get to the cleaning right away, and will hold in humidity that shouldn't mold.

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