Recommend get combo or hygrometer ASAP. Once you have it, if need to raise humidity can use aluminum foil to cover the top metal screen partially. What I do is cover the whole top; then using a sharpie marker place light fixture on top and make an outline. Then using scissors cut the opening just a bit larger than light (maybe an inch around it). That will raise the humidity and will probably work with one or two sprayings a day .
Thank you, I'm planing on heading to petsmart tomorrow, so hopefully it's not to pricey. That and a new sprayer. Normally they don't have a problem with being moist, more they feel cold at times. And even if I leave the lamp on the tank only gets to 75 degrees.
Ive researched and found that 75 degrees is about right for the daytime, and a little lower temp at night. That is where I keep my guys and they seem to be happy.