Follow the instructions exactly!!!! PAM contains a very powerful poison that is a derivative of one used to kill brown snakes on Guam. Do NOT over dose snakes it often goes badly!
You can use traditional methods that are not toxic in the interim, soaking, dri-die or Diatomaceous earth ect. I have had to treat a few rescued snakes for mites and have never used anything else but hard work and soaking and tub isolation (DE tray) it works it is just not for the lazy.