I would say that the "fact" that the consecrated host is now being surrounded by and eaten by mold and bacteria would tend to prove that it is not, "in fact", God.
Perhaps it is just the appearance of mold and bacteria? Or is it REALLY mold and bacteria that have overcome and are now consuming the host?
I would say that you don't understand transubstantiation, though you're quite convinced that you do.
How is airborne bacteria and its effect on the Host any different from the various fauna that attack the Host in our stomachs? Or, for that matter, your theory of attributing superpowers to the Host would make it indissolvable in normal water. But that's exactly the normal procedure for disposal that was being followed here.
Either you've discovered the Achille's heel of Catholic theology or your theory of the host being impervious to dissoution due to its divinity needs work.
What say you?
SD