Ive had my new gecko for about 2 weeks now. every time a walk past his cage he runs out and paws the glass . so when i go over to him he starts screaming and hissing !!! if he`s in a hut while im changing water or cleaning up poo he darts out and bites me !!! then runs around lunging at me !!!! he has drawn blood . what can i do !!!!!??!?!?!?!?!??!