With a shed that poor there is no way the humidity has been staying at 60%. Many of the gauges you buy at pet stores are terribly inaccurate.
When you get a change to take a pic of the tank and post it we can help you get things dialed in.
Until then start reading and learning. This is a very common thread topic and all the answers are out there for you.
Damp moss in the hides is going to be a great addition. If you don't have any get some. During you research you will see people, especially me bring it up and recommend it.