I recently started a colony of dubias and I'm having a really hard time getting the humidity up. They are in a 10 gallon tote with a heating pad on 1/2 of the bottom, the temp stays between 85-95, I had them cooler but they stayed in the warmest spot and since raising the temps they seem happier. There are only about 60 but I'm planning on getting more soon. I have a large dish of water crystals, their food dish and they always have an orange in there along with fresh veggies. No matter what I do though I can't get the humidity up past 35% and I've lost a couple while molting. I have tried a tupperware dish of water with holes in the lid on both the warm and cool sides and it raised it about 2%. I added an air stone to it and that made no difference. I've covered 90% of the ventilation hole and no difference. It is the digital thermometer I use for my lizard tanks so I know its accurate but I've run out of ideas.