Your right, it wasn't the brightest of things to do knowing that this gecko is a biter. I thought it would be worth a try since geckos, at least mine, lick me everytime i put my hand near (referring to all except Bronx). Putting the bit of calcium there seemed ok since the girls just lick it off. Putting a mealie in front of their face every time i handle them is what i thought inappropriate cause then they would think handling=food. I didn't think they would believe calcium itself to be food without the mealworm to go along with it LOL.
I need to do a correction.....i'm not sure if i wrote this wrong the first time, but it was Boo (the non biter) who i had out and i was at my computer desk which is kitty corner to the gecko unit and the guys tanks. Bronx could see Boo from his tank so next time i'll take Boo to the other side of the room 
I only turned Boo so he could see Bronx to see if either would wag their tails.
As for washing, i do, even between handling the girls. (((my hands are so raw they bleed, i wash alot at home and at work)))
I had washed after being in Boos tank before going to Bronx.
Bronx has always been agressive. If i even walk past his tank theres been times he'll jump out of his hide and try to get me through the glass.... I'm not exactly sure how to calm him. Offering a mealie usually results in a screaming session and besides, i don't want him thinking my hand means food either. I don't really care if he doesn't settle, i'm ok with him being uptight but i'd like to be able to clean out his tank or put in food without him coming at me to bite LOL
Red
>>You've probably heard it before, but letting him lick the calcium off your finger was probably setting him up. Then after he bit you, you probably jumped (who wouldn't?). That scared him so he went into hyper-alert SCARE IT AWAY mode ("it" being your hand or maybe all of you). Even though you can let some leopard geckos lick calcium directly off your fingsr and its fine, its still not a good idea ... as you found out. I'd suggest washing your hands well before handling Bronx, as the smell of females (or males even moreso)may entice him to behave ... ungentlemanly towards you.
>>
>>Some leos don't react to seeing other males the same way they do when they can smell them. Seeing the other leo through the glass probably didn't register as 'red alert another male nearby'. Until Bronx is more used to being handled though I would strongly suggest not doing stuff that might provoke him - such as holding him up to a tank with another male. No fair!
>>
>>Red, I enjoy your posts and appreciate the way you're really open about your leos and how they're doing. It gives me the feeling that I kind of know them which is cool. Don't give up on getting Bronx to settle down. He may always be a little jumpy, some leos just are. You can help him by being persistant. Progress maybe slow, but I'm sure you will see progress if you keep it up .. and the calmer he gets the less time he'll spend freaking out. Remember males in particular can live into their 20s so just keep plugging away!
>>
>>Also when Bronx went back into his cage after seeing Boo, he was on his hide awhile. If he was looking tall, sort of stretching up and looking around, that's a behavior you see when a male is aware of BEING male .. I don't quite know how else to put it.
>>
>>Good luck with your critters, and please keep posting!
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>>Andrea A.
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Crested Gecko Zeek:1.0
LEOS: Boo: 1.0 normal , Bronx & Nala: 1.1 blizzard,
Lily: 0.1 patternless, Abby: 0.1 albino, Zoe: 0.1 reduced pattern, Dot: 0.1 hypo
Chip: 1.0 papillion (small dog)
