I was thinking in a over insulating sence, and dead air as well. I think it would be on the safe side to remove them though, thanks a bunch.the thickness of glass would only affect temps in an insulating sense, unless sunbeams could hit it.... then it would act like a solar oven, i think.
i will swap out the guys in glass cages if you want though. i think i have at least 50 containers of that size lying around =P
also, i was just guessing about the brainfried thing. i'm probably wrong. you know how that goes =P