Any suggestions on what to do with these guys? I grouped them together because they’re showing similar issues. The bottom leaves are shriveling up and dropping off. The big one is a cotyledon, the two smaller are kolanchoes, and the last one is a molekenisis (I think). I’m not normally a great succulent owner, so I’ve been following planta’s advice. Most of my other succulents are doing fine, but these ones are struggling. Any help appreciated!