Pacman frog temp and humidity

[nbamvp]

Hey i have a fantasy pacman and was wondering if i could get some advice on heating and how to keep humidity up. He is currently in a 10 gallon glass tank with a metal screen top. I use a red 50w heat bulb for heat. I used to have a heating pad that i put on the side of tank but it didnt add much heat at all. With the bulb it keeps the tank between 75-80. Humidity i try to keep it around 70%. Im sure the bulb doesnt help with the humidity so i mist prob 4-5 times a day to keep it up.
Also i dont know if i should be worried but he stays burrowed usually all day i feed him pretty much everyday as he is a young frog. When he is burrowed i usually uncover his head and put the food infront of him. Most the time he will get up and eat, sometimes i have to keep putting the cricket or meal worm infront of him to eat it. When he does come out he usually hops around a bit then finds an area to burrow. I dont usually see him come out on his own, and he doesnt really use his water bowl. I led him to his water bowl once and it seemed like he enjoyed it stayed there for maybe 10min cant remember exactly and took a big dump:P.

I have only had him for little over a week so maybe thats the reason, I can also tell that he has grown since when i first got him. Iam just wondering if i could get some advice on heating and humidity. Also should i stop uncovering his head to feed him? I wanna make sure he eats lol.

Here is a picture of his cage. water bowl in corner under plant and i added a wooden tunnel he can hide under i slanted it a bit and covered the top with the substrate and added fake plants on top for security. He hasnt used it yet but i guess i just got it today. In the picture he is burrowed under the plants to the left of his wooden tunnel.

Thanks