I mist my tortoise enclosure every morning while he eats and again later in the afternoon. My humidity levels are between 50-80, the enclosure is usually at 50 percent in the morning and goes to 80 percent once I mist it but it will drop throughout the day. I was wondering if I should let the humidity drop naturally during the day and mist it again at night before going to bed so that my tortoise has 80 percent humidity at night. I'm also having to completely drench the substrate otherwise the humidity won't go up. Is it more important to keep humidity level during the day or just during the night?