I was looking into a Mist King to automate humidity, but the calcification on the enclosure walls would bother my OCD tendencies lol. What do you think about these passive solutions (A) here and (B) here?

One of the most amazing insects is a praying mantis, i.e. Hymenopus coronatus; and it happens to be one of the easier species to keep! Metallyticus splendidus is also incredible but each specimen can be hundreds of dollars 😲 and its diet is highly specialized (think silverfish, firebrats, and small roaches); it's definitely better suited for the experienced and advanced keeper!