User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-1758220-20111219210925/@comment-4555457-20111219224019

its skin must constantly replenish a hormone or enzyme that neutralizes the combustibility of the slime, and when its not on the skin the lack of hormone metabolizes the enzyme and boom!

which would mean when the monster is enraged, the testosterone would inniciate a parasympathetic reaction that lessens the effectiveness of the hormone causing it to be in a volatile state, dissolving much faster once it leaves the skin