Steeve you couldn't be more right! I got bit last month on my finger (second knuckle). It was already closed at the time and I had a firm hold of the Tegu with my other hand (thank god!). They do not let go for anything I tried dunking it, running water over it. What finally worked is Julie put the feeding tongs in its mouth and spread them apart. They are sadistic, every 30 seconds they give you this extra little squeeze just to cause more pain. It didn't hurt to bad at the time (not a lot of blood) but the next day my knuckle was swollen and was difficult to bend. I only have Golden Tegus to they are less then half the size of the larger species. Thank god those larger species are more docile!
I let one get a hold of a glove yesterday and it grabbed it and shook it so hard it went air born back and forth until it let go and hit the side of the cage. I don't ever wear gloves to pic them up it makes it harder to hang on to them. But I wanted to see what would happen if it ever got a good bite.