Leaderboard

If I had to guess maybe they're overheating if they were fine then suddenly not. Maybe too close to the lights, then a warm spell came and that pushed them past their comfort zone, or they were somehow receiving a bit of direct sunlight (which, with a dome over the top, will cook them given enough time).

These are so easy to grow. Mine grow in a west facing window. They sit in a shallow tray of rainwater at all times. They get some afternoon Sun. I'd say stop spraying them. How much BRIGHT light do they get? I would stop messing with them and leave them alone. It may be too late by the look of them right now. Hard to say. Time will tell. You may want to get another one in the meantime. They need bright light to produce dew as well. Lack of dew means not enough light.

At this point you have allready messed to much with them. Now just continue your normal care and hope they recover.