(i apologize this is pretty long but i didn't know how to shorten it) my chameleons name is Guillermo and hes a veiled chameleon hes about a year and a half old, but im honestly not positive if its a he or she. when i first got him he wasnt overly friendly like my last chameleon but he was pretty calm and didnt mind me messing with his cage then pne day he like flipped a switch and started hissing all the time and biting at me every time i opened his doors. then i went on vacation and my mom watched him and when i came home he was so sweet again, i could take him out of the cage without a scene and it was great... for like two weeks. and now he back to being a monster again. i can barely even get in to feed him and cleaning his cage means removing him with gloves which barely blocks the bite. i tried doing exactly what my mom does and it didnt help so please any insight would ve greatly appreciated.