Mites :(

[asplundii]

Please forgive my skepticism, but how SAFE is Fipronil on snakes? ... This is the
first time I've heard of anyone using Frontline spray on snakes.

With due respect, just because it is the first time you have heard about it does not mean it is something new. There were articles dating back to the '90s in Reptiles magazine written by vets on the use of Frontline for treating mites and if you listen to the MPR episode where SBK (from the vid above) spoke on this topic you will find out that he learned about it from a vet. Off label usage of medications by vets when it comes to herps is actually pretty common.