Here is the next rule from the Code of Conduct, as described in Spell Sweeper, my latest middle-grade novel, with commentary by the main character Cara Moone.
THE SPELL SWEEPER CODE OF CONDUCT
(Do as I say, not as I bespell)
Do not attempt a purge if a magical creature is in the vicinity. If in doubt, summon the local wizard Secretions from magical entities—blood, mucus, urine, venom, yolk, etc.—can be as dangerous as feral spell dust. Ensure all surfaces are scoured and cleaned of these substances before departing a site.
(I’ve heard dragon pee leaves an odor that can last for decades.)
Below is a photo of me in Spell Sweeper costume, but maybe when it comes to dragon urine, I should go with costume option Number 2!
Spell Sweeper is available now in hardbound, digital, and audiobook formats from your favorite outlet.