Your setup is looking like a good start. I'm gonna assume a couple of things based on the picture and what it looks like:


One...standard glass tank with a screen top? It looks like the screen is at least partially covered with a towel? If you remove that cover, it will allow for more airflow, which will help reduce the humidity level.

Two...that substrate looks like the shredded cocunut husk (Bed-a-Beast, Ecoearth, or whatnot), which is a good one to use. However, when you first prepare it, it soaks up a LOT of water and can take a long time to dry out completely...and that also may be contributing to your excessive humidity. Again, removing that cover and allowing some air to circulate will help dry that out some. Also, if you stir it around with your fingers once or twice a day to bring up the moister stuff on the bottom and expose it to air, it'll dry faster.

And of course, as Nate already mentioned...getting an accurate digital thermometer/hygrometer in there will help you learn exactly what your environment is like, and that will dictate what more steps need to be taken to make it perfect.

Welcome aboard! :