I agree, but if I'm not mistaken, don't the instructions suggest leaving the water bowl OUT of the cage for a few days?* And a few days would NOT hurt the snake.
That's what I'd do, if I had to deal with mites. (*I'm pretty sure they tell you to take the water bowls out so as not to contaminate the water that the snake might
drink, but without the product label, I'm not sure if they also suggest LEAVING the water bowl out...I would, & I agree with you, I wouldn't want to risk the snake
spilling water & absorbing the PAM thru their skin in the wet, ie. "reconstituted" form.)