Give you a big tip that infound to be helping me a ton.... cover the entire top in aluminum foil, cout out a hole for your light making it maybe half an inch bigger, now at the cool side of the tank make a long narrow strip.... after trial and error with the cold side slit im finding no issue keeping my humidity above 50%, i mist maybe once or twice a week now, im using aspen bedding and a 100w basking light, also make sure you have a nice sized water bowl with good surface area within range of your heat source