I bought my first tegu about a month ago, he's argentine b&w. I'm not sure how old he is but he's a little less than 2ft. I've been trying to work with him but when I reach in the tank he gets very upset. Even if I take my time and show him my hand and I don't try to grab him from above he still lunges when I get near him. As soon as he's out of the tank he's fine. He'll crawl on me and close his eyes in the bathroom. Any suggestions on easing his tank aggression?