Mine dry..
Brown tip...ewww ....
But seem to slough it off and keep growing.
Just as Nigel Saunders prescribes!
I figured if he can do it in Canada....
Sorce
Mine do the same here. They grown an inch, shrivel back to 3/4 inch then grow again when it's rainy and humid. I don't pay too much attention to them tbh. While it rains and stays wet overnight they grow, then dry during the day, then grow again.
Another thing that works is keeping the tree watered very little and only misting the aerials. How little you water will depend on how many aerial roots you have.
I'll take a pic in a few and post it but on one of my ficus, this summer I've gone as much as a week with no watering and just misting the top. I believe the lack of water below is a huge factor in how successful and how fast the aerials grow.
Nigel has it down to a T though and I follow his direction.......as we are all familiar w/ the vid