I haven't noticed any serious eye dents in my boy yet but I have been having humidity issues on the warm side of my tank but not the cool side. Cool side ranges are 75-77F with 65-70% humidity at all times but the warm side always manages to drop to around 40-45% (temps 88F) when I leave for the day. I'll mist it a few times a day and have about 75% of the top covered. I also have a humidifier in my room. I seem to be doing everything correctly and the cool side humidity is perfect but the warm side just won't stay up
What kind of heating are you using? It sounds like a CHE or heat bulb. They will both dry out a tank. If you're using one of those try using a UTH instead.