Brazilian Rainbow Boas are one of my favorite types of snakes. People tend to make too big a deal about humidity. With a properly set up cage, it's easy to maintain the high humidity that this species requires. The essential components for maintaining high humidity for BRBs are using a cage with limited ventilation, a large water bowl, and a damp hide box. Glass cages aren't ideal, but it's easy enough to cover the majority of the top of the cage to prevent moisture loss. For a water bowl, I try to use one that covers about 1/3 of the floor space in the cage. Additionally, I use a damp hide box filled with moist peat moss. When you have a cage that's set up properly, you never need to spray. Aside from being a little nippy when they're babies, Brazilian Rainbow Boas have a great temperament. Also, they have a great feeding response, and it's rare to have one that refuses a meal.