Thank you, Daisyl. So happy I found you all.
I don't think it's a water issue. I try to keep it in the sweet spot, and I have a humidifier running during the cold winter months. Not sure what happened. It was growing like gangbusters, and now, suddenly, the new leaves are all weird like that. Whatever it is does not really "wipe off easily." It's kind of crusty and has damaged the leaf surface underneath it. Does anyone have any suggestions for treatment, something that can't hurt and might help? (Neem oil? Diatamaceous earth? Other?) Thank you!