Spider backs away from my fingers as well, which is understandable, considering I've only had him a little over a week. But, whenever I'm using the big pipette to clean up uneaten food/waste, he always comes to investigate when I'm not looking. Since the pipette is a little shorter than his 10g tank, my fingers a little bit in the water, and he scares me sometimes when I look up and he's right there.
Bad experiences with biting. xD I've had anole lizards over the years, and when they bite, they don't let go. At least until they're feet touch the ground. Though I had one that bit me when I was putting him in his tank, right between my thumb and forefinger, and even though I put him down as quickly as possible, he didn't let go. He just bit harder in fact. I still have the marks! Ouch. :[ Never touched that one again, for as long as I had him.