)You could try and bring up the humidity of the room by using some kind of commercial humidifier.

2)Provide a humid hide made out of small rubbermaid container and damp sphagnum moss.

3)If you are using a CHE, you could place it directly above the tank over the water bowl. This is providing you have the top covered off and a section cut off for the CHE. Also it would be advisable to control the element with a proportional thermostat.

4)Mist the tank several times a day.

The following is from a post by member monkeywrench.

Also, you could try putting a wider water bowl in his tank. Wider bowl=more surface area=more evaporation.

If you are using a UTH, put a second water bowl on the hot side so that the UTH will raise the water's temp, again, more evaporation.

You could also build a tank humidifier as outlined in the DIY section of this site.

Or, if you'd like to "beautify" your tank some, get one of those Exo-terra waterfalls and put it in the tank. I used one of those for quite a while in a 20 long, kept the humidity right at 60%.
__________________