Spider mites and thrips need dry conditions to live and produce. If you had them, the first time the moisture hit them they and their eggs were doomed (hitting all the surfaces with water pretty much cleans them up). In most cases of my plants having these critters I never saw them, just the damage - which seems to appear rather quickly.
It was not spider mites and thrips, I'm certain of that. And anyways spraying with water/extra moisture does not make spider mites and thrips go away, a natural or chemical insecticide is needed to really get rid of them. And thrips (at least the western flower thrips) thrive in warm humid greenhouses.
__________________ Camille
Completely orchid obsessed and loving every minute of it....