Ah yes, I meant coconut fiber, not husk, sorry, englisch is not my first language haha. I do not have a screen top on my tank but rather a screen bar of about 10cm width on the top and front, so the flow of air is not the problem i think.
I do spray the tank regulary every day to keep humidity at a good level and have 3 sides of the tank isolated, so that helps with keeping up temperature and humidity. Sadly I do not have the financial means right now to get an entirely new terrarium right now, but i do plan to do that in the future.