Yes, Reptile Basics is super fast. In the meantime, you can soak her in the bathtub in tepid water (only slightly warm to your wrist). This will drown whatever mites are on her and help her feel more comfortable until she can be treated. But the Reptile Spray RBI sells is also referred to as Reptile Relief and some better quality pet stores stock it.
Completely gut out your snake's enclosure and thoroughly wash his hides and water bowl (and any other permanent deco in there). Use the Reptile Spray and spay down/wipe out the enclosure (make sure to get in all the nooks and crannies). Replace the substrate with paper towels. Use a seperate clean tub (or bathtub if your snake is large) and spray down your snake with the same Reptile Spray. Allow him to dry and place him back in his enclosure. Do the same thing with all of your other snakes and their enclosures (you have to assume that your other snakes might also have them. Mites can and will travel and better to be safe than sorry).
Mites can come home on YOU. If you visit anywhere that has reptiles, you have the potential to bring home mites. Mites are extraordinarily resourceful and sometimes it seems as though they just "magically" appear in a collection no matter how careful a keeper is. There's no way to know how your snake got them. He could've had ONE on him when you first got him and the infestation is only now becoming apparent. I treat EVERY new snake as soon as I step through my front door with Reptile Spray. So far, I've been lucky and have not had any mites set up house. I intend to keep it that way, but if you work with snakes long enough, you have to expect to deal with them sooner or later.![]()