I have a baby beardie also. I would raise the hot side temps they need between 100-105 or so. Mealworms are not good at all for babies and can cause a lot of problems. My beardie used to be a brat like that to but it's because it is freaking out over a huge thing reaching in the cage. Find a way u feel comfortable and get it out into ur hands and hold it a little bit each day. The biggest help to me was the advice when u stick ur hand in the cage and it opens its mouth like its going to bite stick a peice of greens or a worm in its mouth. It will completely shock the beardie and u can pick it up without the open mouth coming at u. Also how old is the beardie? I know around 6-7 months my little guy turned into a black beardie open mouth brat but that's cuz he hit what's considered beardie puberty lol. Also u could put the baby into a sink of shallow water (up to mid back) and let it drink up more water as often as u want. I still do this 3x a week and boy does he drink.