She brought them home from the show...mites get passed around, even to snakes that arrived 'clean'. Ugh! (Glad she ate for you.)
I have not had to treat any snakes since long before PAM was on the market, so all I can say is follow the directions very carefully. Others here have talked
about using a spray (Natural Chemistry, I think?) on the snake itself & in the meantime, until you can treat the cage with PAM...apparently the spray is safe,
but I've not used that either.
What I'd personally do is to gently bathe that little noodle in shallow & soapy lukewarm water (measure it, if it feels warm to you, remember you're about
98.6*, so it's too hot for her). Use a bit of mild Ivory dish soap...it breaks the surface tension & makes the mites drown (impairs their breathing). Do this
for about 15 minutes, & also clean the cage well, and use white paper towels & only plastic hides (mites will stay behind & saddle up again if you don't).
This will remove & kill MOST of the mites but not all...a few may hide on her face (don't submerge her face & don't allow her to drink soapy water) so you
still need to use the other stuff, but mainly it's important to reduce the mite load as quick as you can on a tiny snake. Mite populations explode exponentially
& can weaken, even kill snakes, especially small ones, faster than you think.
Poor little snake...but you'll get her past this.

Just don't wait a few days for PAM to arrive, get rid of all the mites you can now.