I'll be following this thread, mine is thinning out quickly too! The main stems are still solid, but it seems to be jettisoning the leaves below the 'canopy'. They are still green when it drops them, and there is a lot of drainage, the pot is on top of a plastic crate and full of holes. I think I might dial back the mistings anyway, it's currently set to 6 mistings a day for 2 minutes each time. Ivy's not impressed, it's starting to get rubbish to hide in. Oh the other thing I did was adjust the curtains of the window next to the enclosure so it gets more daylight.