You're welcome! I truly understand how much fun it is to mist.
Just in case....The other thing to check is for bugs in the soil. I do this with all my plants, when they first come in the door, and also if I think something is up.
I put a slice of raw potato on top of the soil, pushing it in a little bit. Come back a few hours later (don't peek too soon) and pick up the potato slice carefully and lay it on a paper towel. There should be some soil sticking to the potato, resist the urge to shake it off. Use a flashlight and a magnifying glass to inspect the potato slice. Most likely, if the plant has bugs in the soil there will be at least one crawling on the potato slice. Sometimes I even leave the potato slice longer to be really sure (or if it's a bigger pot and it would take a while for bugs to migrate). Oh, and I always take a bag to discard the used potato in, so I'm not carrying it through the house (containment).
Hopefully it's not bugs, but thought I would mention it, because checking can possibly save days of wondering, "what the heck is going on?"