Around 2 weeks ago, I bought a subadult Giant Asian mantis from a local reptile store, along with a 3 gallon terrarium, some substrate, and somethings for him to climb on. In the following days, he would refuse to eat anything that I put in front of him, but other than that he looked healthy. Fast forward a few more days, and he got really weak and died. I kept his enclosure at around room temp (73-77f), and I sprayed his enclosure once a day. Following his death, I went back to the same store to buy another one, this time an African Twig mantis hoping for a better outcome. I changed her tank around a little and increased the temp (75-80) and was only able to mist her once. She followed the same fate as the other and refused to eat, got really weak, and died. Before I buy another one, I want to make sure that I am not doing anything wrong. As far as I know, the enclosure is good. I used zilla jungle mix substrate, a small succulent. For the first Asian Mantis, I used wood I bought from the pet store for him to climb on, for the Twig Mantis, I used twigs and tree bark I found from outside.Any help would be great because it sucks having two mantis die in a week and a half.