i was (am) in a similar situation with my lizard. however, it is only 16 inches snout to tail.
to recap my post to your first thread: when i first got the lizard he was a total asshole...biting, tail whipping, clawing, etc. he'd even gone so far as to latch on to a finger, bite down real hard, then start flailing his body. (i guess he really wanted to drive his point home.) because of his size, he isn't capable of doing any real damage.
as i said before, i waited a few (2-3) days after i got him before i started handling him. it took him that long to start eating and pooping on a regular schedule.
i didn't start slow and build up to anything, i just stuffed my hand in his cage and snatched the lizard. i started in with the normal "lizard" routing (check for mites, check for abceses, check for crap that doesn't seem "right," rub off shed, etc.) the lizard was not a happy camper. he kept up his bad behavior for at LEAST a month before i saw ANY improvement.
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i know many people say to start off slow, build the lizard's trust, let him get used to you, etc. i hear many have pretty good results doing it like that.
i don't know you, and i'm not there to watch you work with your animal, however it sounds to me like the lizard gives you a little resistance and you back off for fear of hurting him, upsetting him, or whatever.
let me preface my next statement by saying, i'm not cruel to the animal. it's well fed, clean, proper temperatures, reasonably large enclosure (for now), etc. now, when i interact with the little green monster, there is no doubt as to who is the "alpha."
he tail whips, the hand keeps comming; he runs, the hand keeps comming; he bites, the hand keeps comming--i've even gone so far as to let him bite my thumb, then hold it in his mouth while he clamps down (years of playing nintendo as a child gave me "ninendo thumb;" it is impervious to his attacks
) it doesn't hurt the lizard, but as he's sitting there with this thing in his mouth, and doing his damnedest to show me how tough he is, then realizing, "hey man, this ain't working; that human is still going to pick me up." eventually, he stops.
when you do finally pick him up, and he starts squirming, don't let him get away. get a firm grip on him, and make it clear that he isn't getting away until YOU decide he is. don't grab his legs, arms, or his tail; but, he should still be small enough that you can easily get your hand around his body. do it, and don't let go.
to summarize: YOU are the alpha. YOU are the one who decides what that lizard will and will not do. DO NOT let the lizard tell you how it is going to be.
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i've had the lizard for almost 2 months. he doesn't bite anymore. he doesn't tail whip anymore. he now will sit still while i examine him, and rub off old shed. he runs MUCH less. he is in good health, he's just learned that it's pointless to resist. in fact, he gets put down sooner if he doesn't fight back.
current score: Glac: MANY Lizard: 0 (and ig's DO keep count.)