I haven't been able to find any original sources yet (and I'm not about to watch that podcast) but I'm fairly sure that what they have found is a planet in the

I haven't been able to find any original sources yet (and I'm not about to watch that podcast) but I'm fairly sure that what they have found is a planet in the habitable zone. And that's pretty darn neat in itself. (What was really missing was information about its size and density.) As for the bits about it being "muggy", I can only assume that this is something the journalists, looking for an angle, tricked the scientists into saying. We can't say anything definitive about chemical composition of these planets at this stage, we can only infer things from their temperature and density.