I have a c-serpents rack that I have had issues with but only in the smaller hatchling tubs.. If they spill the water bowl at all (they are notorious for doing so) you will get condensation on that front panel. I would say if it becomes EXCESSIVE drill holes until you get the desired humidity.. That's what I did with the hatchling tubs.. Big thing you have to worry about is if there bedding is wet... That's where you will run into issues.. Sounds like this is normal humidity build up from the water bowl..