Can't say I've ever had an infestation like described, but from what I know about 'em you just have to clean like a madman. It might help to determine what species you got, if different types are effectively treated differently. They make sticky traps with pheromones that attract them, which I hear are really effective, but pricey. I guess a pet bat wouldn't work in a studio (flying by echolocation and all), besides being more annoying than the moths themselves. :)
[FONT=Palatino Linotype]"Bust a nut!" - Dimebag
"Imagination is more important than knowledge." - Einstein[/FONT]
"Imagination is more important than knowledge." - Einstein[/FONT]