Soaking in F10 is way over-kill, IMO. The world is full of germs...nothing is sterile or needs to be (except maybe surgery in hospital, as much as possible). Just a
reasonable reduction of risk is all you need...I don't have sick snakes, & they've had real branches for many years. Sure, birds poo on branches, & so on, but just
a scraping off of the bark bark & an external spray is enough, IMO. And I can't promise that wood literally soaked in F10 would be safe, as it would take a long time
to dry, & dry is what this stuff needs to be for snake-safety. Not only that, but just disposing of the large amount of F10 you'd need to literally soak large branches
is also an environmental hazard when you dump (or drain) it...it's just a bad idea, IMO.
hahaha, this is the approach I take as well. My boy sleeps in his own poop, so I can’t imagine anything living on a branch is grosser than him some days! I’d just let them bake in the sun.